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Artificial products / Manufactured products · Artificial product type · Synthetic product
Synthetic Emerald
Synthetically made green beryl, the counterpart of natural Emerald; GB/T 16552-2017 Annex A Table A.4 lists it as "synthetic emerald". This page compares how the major standards and institutions name it, what must be disclosed when selling it, whether it can be worn every day, how it is treated and identified, and which source each conclusion comes from.
Price, rarity and origin are outside the scope of this wiki.
What this page can answer
This page covers
- How Synthetic Emerald forms and what gives its colourFormation setting, process and timescale, each finding graded and sourced
- How to identify Synthetic EmeraldIdentification points from the research literature
- Hardness, density and refractive index of Synthetic EmeraldEach value with its source and check date
- Synthetic Emerald in English, Chinese and Japanese; national standard namesNames in four languages, the GB/T standard name and the suggested listing name, names in national standards; and: Do GIA, FTC, CIBJO and Gem-A use the same wording for it?
- Listing and disclosing Synthetic EmeraldThe listing name to use; what must be disclosed before sale
- Standard clauses that define Synthetic EmeraldWhich clause defines it, each cross-checked
What we cannot conclude
- Whether one particular bead is natural, treated or synthetic — only a laboratory report can settle that.
- Geographic origin, unless an origin report accompanies the item.
- Price, rarity or investment value: this wiki covers naming and disclosure only.
Material research: formation, causes and history
What authoritative sources say about how this material forms, what causes its colour and optical effects, where its name comes from and how people have used it. Each statement carries an evidence grade and its sources; it describes the material in general, not any specific piece.
How it forms
Synthetic emerald is green beryl that humans have crystallised in a laboratory to correspond to natural emerald, and it is not the product of natural geological ore formation. Since CIBJO defines a synthetic stone as an artificial product whose chemical composition, physical properties and structure match the natural counterpart's essentially, synthetic emerald reproduces natural emerald's composition and structure. It is usually made by controlled crystal-growth techniques in the laboratory — flux or molten-solution growth, or hydrothermal growth — inside sealed vessels at controlled temperature and pressure, with Cr and/or V introduced to provide the green colour; the Be-bearing-pegmatite/ultramafic reaction and the basinal-brine ore-forming processes that natural emerald needs play no part.
Scope: Applies to explaining the artificially grown nature of synthetic emerald and its naming and disclosure boundaries; not used to describe the genesis of any natural emerald deposit.
Sources CIBJO Gemstone Book 2022 · GIA Emerald Description · G&G Fall 2017
Where it forms
Controlled laboratory environment: artificial crystal growth in sealed vessels under controlled temperature and pressure, not a natural geological setting.
Sources CIBJO Gemstone Book 2022 · GIA Emerald Description · G&G Fall 2017
Growth medium and colouring: a molten flux/high-temperature solution or hydrothermal fluid supplies the beryl components, with Cr/V added to produce green.
Sources CIBJO Gemstone Book 2022 · GIA Emerald Description · G&G Fall 2017
How it forms, step by step
Prepare Be-, Al- and Si-bearing feedstock with Cr/V and other colouring elements added.
Sources GIA Emerald Description
Under controlled temperature and pressure, green beryl nucleates and grows by solution-growth techniques such as the flux (molten-salt) method or hydrothermal growth.
Sources GIA Emerald Description
After growth the crystal is cooled/annealed slowly, giving a synthetic crystal with essentially the same composition and structure as natural emerald.
Sources GIA Emerald Description
The whole process is man-made with no natural ore formation; the product must be named and disclosed as e.g. 'synthetic emerald'.
Sources GIA Emerald Description
Link to appearance
Its chemical composition, physical properties and structure being essentially those of natural emerald, synthetic emerald has essentially the same colour and main optical properties; flux residues, growth striations or hydrothermal "nailhead" inclusions may nonetheless appear and serve for identification in the laboratory.
Sources CIBJO Gemstone Book 2022
Timescale
The selected authorities give no growth duration for synthetic emerald; the only time-related information is that the first gem-quality synthetic emeralds were produced in the mid-1920s, which is science history rather than growth time.
Sources CIBJO Gemstone Book 2022 · GIA Emerald Description · G&G Fall 2017
Related base materials
- Emerald (green beryl): synthetic-counterpart | Synthetic emerald is the laboratory-grown counterpart of emerald
- Beryl (Be3Al2Si6O18): mineral-host | The parent mineral is likewise beryl
Supporting findings
In their chemical, physical and optical properties, synthetic gemstones match their natural equivalents essentially; the difference is that a laboratory grows them, whereas natural mineralisation forms the natural ones.
Evidence grade AScope: A general-principle statement, not tied to a single growth method.
Sources GIA Emerald Description
How it is identified
An emerald's colour and outward appearance are no substitute for identification. The central work is microscopic study of internal features: natural stones may carry multiphase fluid and mineral inclusions, whereas flux- or hydrothermally grown synthetic emeralds can show flux residues, phenakite crystals, colourless seeds or roiled growth zoning, and clarity-enhanced material may show flattened gas bubbles with a flash effect. Chemical analysis such as EDXRF and Raman micro-spectroscopy support these observations. Because such features must be read by trained specialists, the identification should be made by a qualified gem laboratory.
Evidence grade AScope: Applies where a natural, synthetic or treated emerald must be distinguished; no self-administered criteria are given.
Synthetic emerald is man-made emerald. Such material is man-made, so natural origin determination does not apply. Origin determination is meaningful only for natural stones: for synthetic material the synthesis or treatment status has to be settled first, and a place name attached to it is at most a brand or a place of manufacture, not a geological source. Any separation of species or naturalness must be issued by a qualified laboratory for a specific specimen, and origin cannot be inferred from appearance or name.
Evidence grade AScope: Origin cannot be inferred from appearance or name; an origin conclusion must be issued by a qualified laboratory for a specific specimen, and this entry provides no self-test criteria or thresholds.
Other research findings
CIBJO defines a synthetic stone as an artificial product whose chemical composition, physical properties and structure match those of its natural counterpart essentially; on that basis synthetic emerald is defined.
Evidence grade AScope: A classificatory/naming-level definition; not a specific growth process.
Sources CIBJO Gemstone Book 2022
Synthetic emerald must be named and disclosed as 'synthetic/laboratory-grown/laboratory-created emerald', e.g. 'synthetic emerald'.
Evidence grade AScope: A naming/disclosure rule; not provenance or authenticity testing.
Sources CIBJO Gemstone Book 2022
Synthetic emerald is one of the commercially available synthetic stones listed by CIBJO, alongside synthetic ruby, synthetic sapphire and synthetic amethyst.
Evidence grade AScope: Establishes commercial availability only; not any specific producer or process.
Sources CIBJO Gemstone Book 2022
Richard Nacken, in the mid-1920s, was the first to produce synthetic emeralds of gem quality.
Evidence grade BScope: A science-history statement from a literature listing; no process detail given.
Limits of this research
- Research status: Formation, occurrence or other material-specific findings found in authoritative sources
- The sources define synthesis and naming but do not document synthetic emerald growth equipment or producers; flux/hydrothermal routes are the conventional laboratory approach.
- The Nacken early-synthetic-emerald information comes from a GIA Library related-articles listing, without process detail.
Methodology
- Origin determination and its limits
- Quality grading and value factors
- How gemmology became a technical discipline
Evidence grades
- A
- Standards bodies, government geological surveys, peer-reviewed research and museum records
- B
- Institutional educational material
- C
- Specialist databases or cautious readings
A statement is never graded above its strongest source.
This section is LumaLark's own factual restatement of public authoritative sources, credited item by item; it contains no verbatim excerpts, images or third-party logos.
DecideListing name, disclosure, care and treatments
- Suggested listing name
- Synthetic Emerald
GB/T 16552—2017 Table A.4 “Synthetic Emerald” · CIBJO Gemstone Book 2022 4.3.3.1
This page cannot answer
Natural? · Origin · Price
A lab report settles these; this wiki covers naming and disclosure.
Related:What this page can answer
Answer at a glance
"Synthetic Emerald" is a market name rather than a mineral species name; before using it, verify: Not a mineral: man-made or non-mineral material.
Evidence
- GB/T · Table A.4, row 合成祖母绿 (Synthetic Emerald)
What this means for you
Before buying, check the recommended listing name "Synthetic Emerald" and any disclosed treatments on this page, and ask the seller for a grading report if in doubt.
Known uncertainty
- This entry's exact material identity is not fully settled.
- See “Disclosure and cautions” above
- Last reviewed
- 2026-09-01
Trade-name ruling
- Not a mineral: man-made or non-mineral material.
- Suggested listing name
- Synthetic Emerald
Care and wear
No care facts are recorded for this entry itself. Its parent material has care records: see Emerald.
VerifyNames, standards, technical facts, clauses and sources
Names
The name register below lists 3 names for Synthetic Emerald in non-Latin scripts: 1 with no restriction recorded on use as a name, 2 that must not be used as a name.
Standard and listing namesThe Chinese formal name for Synthetic Emerald is the Chinese term for synthetic emerald (GB/T 16552—2017 Table A.4), and the suggested listing name is Synthetic Emerald. Names in four languagesThe four-language names are the Simplified Chinese name, the Traditional Chinese name, the English name Synthetic Emerald and the Japanese name; the Japanese name is the entry's own Japanese name, and GSJ (Japan) usage for it is not yet verified by this site. Institution usageOn authority wording, GIA has Laboratory-grown Emerald, FTC has Laboratory-created Emerald, and CIBJO and Gem-A both have Synthetic Emerald. Trade and mineralogical namesThe mineralogical name refers to synthetic green beryl corresponding to emerald. National standard namesNational and regional formal names are: Germany (RAL) Synthetischer Smaragd, the EU Synthetic Emerald, and France (DGCCRF) Émeraude synthétique. Trade and mineralogical namesIn the name register, regenerated emerald is a narrower name (variety or subtype) with no restriction registered; Linde emerald and Chatham emerald are trade names registered as unusable names, because under GB/T 16552—2017 a stone should not be named directly after its producer or manufacturer; the formal name is Synthetic Emerald.
Name register
Every name recorded for this entry, with how it is classified, whether it may be matched to this entry automatically, whether it may be used as a product name, and the clause it rests on.
This table scrolls sideways on narrow screens.
| Name | Type | Matching | Use as a name | Basis |
|---|---|---|---|---|
| no restriction recorded (1) | ||||
| 再生祖母绿Simplified Chinese | narrower name (variety or subtype) | matched automatically | no restriction recorded | GB/T 16553—2017 5.4.4; GB/T 16552—2017 5.1.3.1 e) |
| not to be used as a name (2) | ||||
| 林德(Linde)祖母绿Simplified Chinese | market name | matched automatically | not to be used as a name | GB/T 16552—2017 5.1.3.1 b); Note: GB/T 16552—2017 §5.1.3.1 b) uses it as the example of a rule: the name of a producer or manufacturer must not be used directly as the name (a counter-example, not a trade name); the standard name is synthetic emerald. |
| 查塔姆(Chatham)祖母绿Simplified Chinese | market name | matched automatically | not to be used as a name | GB/T 16552—2017 5.1.3.1 b); Note: GB/T 16552—2017 §5.1.3.1 b) uses it as the example of a rule: the name of a producer or manufacturer must not be used directly as the name (a counter-example, not a trade name); the standard name is synthetic emerald. |
How each authority words this name: see Names › Authority wording.
- GSJ (Japan) formal name
- 合成エメラルド (not yet checked for this body — the entry's own Japanese name is shown)
- Chinese formal name
- 合成祖母绿 (GB/T 16552—2017 Table A.4)
- Mineralogical name
- Synthetic green beryl corresponding to emerald
Four-language names
- 简体中文
- 合成祖母绿
- 繁體中文
- 合成祖母綠
- English
- Synthetic Emerald
- 日本語
- 合成エメラルド
National and regional formal names
- Germany (RAL)
- Synthetischer Smaragd
- European Union
- Synthetic Emerald
- France (DGCCRF)
- Émeraude synthétique
See also: Misleading and prohibited trade names · Supplementary name index
Classification
- Origin
- Artificial products / Manufactured products
- Material domain
- Artificial products / Manufactured products
- Browsing family
- Synthetic gem products
- Identity tier
- Artificial product type
- Mineral chemical class
- Mixed / composition-dependent
- Construction or treatment status
- Synthetic product
What it is and how it's identified
The material facts for Synthetic Emerald are recorded under GB/T 16553—2017: composition Be3Al2Si6O18, containing Cr and other elements; crystalline, hexagonal, with hexagonal prismatic crystals from the flux method and tabular crystals from the hydrothermal method; Mohs hardness 7.5–8, with imperfect cleavage in one direction; density 2.65–2.73 g/cm³; optic character anisotropic, uniaxial, negative; refractive index 1.561–1.568 and birefringence 0.003–0.004, which this site notes are typical values in usual cases, not absolute limits, the clause having finer ranges with the overall value used; and for the untreated state, moderate pleochroism, green and bluish green, and vitreous lustre.
Registered material facts
Each row carries its own source and check date and can be cited on its own; “—” means the cited source gives no value, not “none”.
Definition
Synthetic Emerald — composition (chemistry): Be3Al2Si6O18;elements such as Cr are contained
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Structure
Synthetic Emerald — structure (overall): crystalline
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — structure (crystal system): hexagonal
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — structure (crystal habit): hexagonal prisms from flux growth; plates from hydrothermal growth.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Durability
Synthetic Emerald — Mohs hardness: 7.5–8
GB/T 16553—2017
Reference points on this site: Talc 1–3, Fluorite 4, Apatite 5–5.5, Orthoclase 6–6.5, Topaz 8, Diamond 10 (Source: GB/T 16553—2017); Gypsum 1.5–2, Calcite 3, Quartz 7 (Source: Handbook of Mineralogy); Corundum 9 (Source: GIA Gem Encyclopedia (care guide))
- Does this standard apply
- applies to this entry
- General note
- hardness only, not durability
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — cleavage: imperfect in one direction
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Physical properties
Synthetic Emerald — density: 2.65–2.73 g/cm³
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Optical
Synthetic Emerald — optic character: uniaxial, optically negative (anisotropic)
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — refractive index: 1.561–1.568
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- Qualification
The clause we cite gives this as a typical value. It is a common value, not an absolute limit.
- General note
- the clause has finer ranges
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — birefringence: 0.003–0.004
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- Qualification
The clause we cite gives this as a typical value. It is a common value, not an absolute limit.
- General note
- the clause has finer ranges
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — pleochroism: moderate, green, blue-green
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — fluorescence (overall): weak to moderate, red; strong, red; stronger under long wave; moderate to strong, red; stronger under long wave; Gilson flux-grown type: none.
GB/T 16553—2017
UV fluorescenceredweak–moderateredstrongredmoderate–strongDots are illustrative colours built from the colour names, not measured values
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — spectrum (UV-visible): Gilson flux-grown type: 427 nm absorption peak due to iron; other absorptions are the same as natural emerald.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — spectrum (infrared): Si-O and similar groups in beryl vibrate to give the diagnostic mid-IR bands. Flux-grown synthetic emerald lacks the OH-vibration bands of the functional-group region altogether, whereas hydrothermally grown synthetic emerald shows bands there (OH, mineralizers and so on) unlike those of natural emerald.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-22
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-22)
- Fact checked on
- 2026-09-22
Synthetic Emerald — magnification: flux method: leftover flux forming veils, networks or occasionally small droplets, platelets of platinum, crystals of phenakite, straight, even parallel growth faces; hydrothermal method: nail-shaped inclusions (a phenakite crystal forms the head and a gas-liquid inclusion the point), branching (dendritic) growth striations, crystals of phenakite, metal inclusions, a colourless seed plate, fine two-phase inclusions lined up in parallel, two-phase inclusions shaped like parallel tubes; regenerated emerald: a thin skin of synthetic emerald overgrown on colourless beryl, under the loupe the surface shows a network of cracks, seen from the side, several layers can be made out.
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Emerald — body colour: moderate to dark green, blue-green and yellow-green.
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- Qualification
The colours GB/T 16553—2017 lists for Emerald overlap with this entry: green, blue-green and yellow-green.
- General note
- colour alone is not identity
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quality factors
Synthetic Emerald — quality factor (lustre): vitreous
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.4 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Each row's “Source & check” expands to the full source; the date beside it is the fact check date.
This material (RI / SG midpoints): 1.565 / 2.69; Closest values: 1Charoite 1.554 / 2.66, 2Iolite 1.563 / 2.61, 3Aventurine Quartz 1.548 / 2.67, 4Qingtian Stone 1.565 / 2.77, 5Aquamarine 1.58 / 2.79
Show the full chart (330 registered materials)
Outside the full chart's range, drawn as triangles at the edge (RI / SG midpoints): Hematite 3.045/5.12, Synthetic Rutile 2.76/4.26, Rutile 2.753/4.23, Synthetic Moissanite 2.67/3.22
Clause-level definitions
Synthetic Emerald has a clause-level definition in GB/T 16552—2017 Annex A under the entry name Synthetic Emerald, defined as synthetic green beryl corresponding to natural emerald; the clause basis is GB/T 16552—2017 Annex A, and the cross-check result is: listed directly in GB/T; not found under a standalone heading of the same name in CIBJO.
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| Term | Clause | Definition | Cross-check |
|---|---|---|---|
| Synthetic Emerald | GB/T 16552-2017 Annex A | Synthetic green beryl corresponding to emerald | Listed directly by GB/T; CIBJO carries no standalone entry under the same name. |
Evidence and sources
Authority basis and clause sources
Sources
- CIBJO – The World Jewellery Confederation. Gemmological Laboratories Book (Blue Book), Gemmological Commission 2024-1.
- CIBJO – The World Jewellery Confederation. The Gemstone Book (Blue Book), 2022.
- SAMR / SAC (China). GB/T 16552—2017 Gems — Nomenclature.
- Federal Trade Commission (United States). In the Loupe: Advertising Diamond, Gemstones and Pearls.
Further reading
Related entries and topic cluster
Parent entry and related pages on this site. Rows marked “Planned” are suggested new content and have no link yet.
Related-entry tree for Beryl on this site: 11 entries listed by this site's parent-entry links; synthetic, treated and similar entries carry their recorded state after the name; this page (Synthetic Emerald) is marked.
- Beryl
Sub-entries (9)
- Aquamarine
- Colombian Emerald
- Emerald
Sub-entries (1)
- Synthetic Emerald (Synthetic product)
- Goshenite
- Heliodor / Golden Beryl
- Maxixe Beryl
- Morganite
- Red Beryl
- Zambian Emerald
This table scrolls sideways on narrow screens.
| Page | Content | Status |
|---|---|---|
| Browsing family | Synthetic gem products | Live |
| Related articles | To be added (placeholder) | Planned |
Who maintains this page
The material facts in the Synthetic Emerald entry are maintained by the LumaLark wiki and matched one by one to the standard clauses or institutional sources they cite: every fact carries its source (with a clause or page locator) and a check date, so it can be traced back to the original; clause-level definitions also carry a cross-check result. The entry exists so that buyers and sellers can check naming, disclosure and material facts item by item.