- Brand Name : CHAOPAIZHIWU
- Main Stone : Emerald
- Certificate Type : Third Party Appraisal
- Item Weight : 0.25ct-5ct
- Hign-concerned Chemical : None
- Origin : Mainland China
- Certificate : Yes
- Item Height : Standard
- Item Type : beads
- Item Weight : 0.25ct-5ct
- Certificate Number : As Certificate Number
- Metals Type : None
- Item Shape : Oval Shape
- Fine or Fashion : Fine
- Lab Grown Ememrald : Yes
- Color : Emerald Green
- Shape : Oval Cut
Lab-Grown Emerald
1. Chemistry and Structure
Composition: Identical to natural emeralds, lab-grown emeralds consist of beryllium aluminum silicate (Be₃Al₂(SiO₃)₆) with trace chromophores (chromium, vanadium) that produce their iconic green hue.
Synthesis Methods:
Hydrothermal Method: Mimicking natural growth conditions, aluminum oxide, beryllium oxide, and other raw materials are dissolved in a high-temperature, high-pressure aqueous solution. Seed crystals induce controlled growth over 2–3 months.
Flux Method: Raw materials are mixed with fluxes (e.g., lead molybdate) and heated to 1,400–1,500°C. Slow cooling allows emerald crystals to precipitate over 6–12 months.
2. Physical Properties
Hardness: Mohs 7.5–8 (slightly lower than natural emeralds), requiring care to avoid scratches during daily wear.
Optical Performance: Refractive index 1.566–1.602, birefringence 0.005–0.009, and dispersion 0.014 (lower than diamond). Vivid color but subdued fire.
Density: 2.67–2.78 g/cm³, closely matching natural emeralds.
Inclusions: Hydrothermal-grown stones often show "nailhead" or "cloud-like" inclusions; flux-grown stones may contain flux residues or metallic filaments.
3. Jewelry Applications
Core Use Case: Affordable alternatives to natural emeralds (1/10–1/5 the cost), ideal for everyday jewelry or high-end custom designs.
Treatment Techniques: Some products undergo oiling (to improve clarity) or surface coating (to enhance color), though treatments must be disclosed.
4. Quality Grading
Color: Graded by GIA standards from Light to Dark, with "Emerald Green" (vivid, saturated hue) being the most desirable.
Clarity: Lab-grown emeralds are typically cleaner (VS to IF grades) compared to naturally occurring stones, which often contain fractures and inclusions.
Cut: The classic emerald cut (step-cut) maximizes color display, requiring attention to proportion and symmetry.
This translation maintains technical precision, aligns with industry terminology, and preserves the original structure for clarity.
1. Chemistry and Structure
Composition: Identical to natural emeralds, lab-grown emeralds consist of beryllium aluminum silicate (Be₃Al₂(SiO₃)₆) with trace chromophores (chromium, vanadium) that produce their iconic green hue.
Synthesis Methods:
Hydrothermal Method: Mimicking natural growth conditions, aluminum oxide, beryllium oxide, and other raw materials are dissolved in a high-temperature, high-pressure aqueous solution. Seed crystals induce controlled growth over 2–3 months.
Flux Method: Raw materials are mixed with fluxes (e.g., lead molybdate) and heated to 1,400–1,500°C. Slow cooling allows emerald crystals to precipitate over 6–12 months.
2. Physical Properties
Hardness: Mohs 7.5–8 (slightly lower than natural emeralds), requiring care to avoid scratches during daily wear.
Optical Performance: Refractive index 1.566–1.602, birefringence 0.005–0.009, and dispersion 0.014 (lower than diamond). Vivid color but subdued fire.
Density: 2.67–2.78 g/cm³, closely matching natural emeralds.
Inclusions: Hydrothermal-grown stones often show "nailhead" or "cloud-like" inclusions; flux-grown stones may contain flux residues or metallic filaments.
3. Jewelry Applications
Core Use Case: Affordable alternatives to natural emeralds (1/10–1/5 the cost), ideal for everyday jewelry or high-end custom designs.
Treatment Techniques: Some products undergo oiling (to improve clarity) or surface coating (to enhance color), though treatments must be disclosed.
4. Quality Grading
Color: Graded by GIA standards from Light to Dark, with "Emerald Green" (vivid, saturated hue) being the most desirable.
Clarity: Lab-grown emeralds are typically cleaner (VS to IF grades) compared to naturally occurring stones, which often contain fractures and inclusions.
Cut: The classic emerald cut (step-cut) maximizes color display, requiring attention to proportion and symmetry.
This translation maintains technical precision, aligns with industry terminology, and preserves the original structure for clarity.
Lab grown emerald has some inclusions more or less , just like natural emerald gemstones.
However some lab emerald stones are clean and without any inclusions , or only has little ...
Please contact me which kind you want before you want to place order.
About the real caract weight, we just list some range of carat weight , approximately weight,
as usual we will send you the picture of real weight of stone before shippment.
Lab Grown Columbia Emeralds Oval Shape Gemstone VVS1 For Diy Jewelry Pendant Br
وحدة SKU: 1005006136554647
57.00£السعر