COMPARE GUIDE
Green SapphireVSSynthetic Green Sapphire
Side-by-side comparison of physical properties, fluorescence, and crystal system — to identify by observation.
Physical propertiesPROPERTIES
| Property | A: Green Sapphire | B: Synthetic Green Sapphire | Verdict |
|---|---|---|---|
| Refractive index (RI) | 1.762–1.770 | 1.762–1.770 | Nearly equal |
| Specific gravity (SG) | 3.95–4.03 | 3.98–4.05 | Overlap |
| Mohs hardness | 9.0 | 9.0 | Nearly equal |
| Birefringence | 0.008 | 0.008 | Nearly equal |
| Dispersion | — | — | — |
Optics & fluorescenceOPTICS & UV
| Property | A: Green Sapphire | B: Synthetic Green Sapphire |
|---|---|---|
| Crystal system | 六方晶系（三方晶系） | 六方晶系（三方晶系） |
| Pleochroism | 強（緑・黄緑） | 強（緑・黄緑） |
| Chelsea filter | inert | — |
| UV (long-wave) | inert | — |
| UV (short-wave) | inert | inert |
ObservationOBSERVATION
◆nclusions, and angular color banding absent in flame-fusion synthetic. RI, SG, and Mohs are identical; morphology, color zoning, and FTIR/UV-Vis spectra discriminate natural from synthetic. and gas bubbles diagnostic of Verneuil at 10× immersion settle the question for flame-fusion stones.
Color categoriesCATEGORIES
A: Green Sapphire
Green
B: Synthetic Green Sapphire
Green
DISTINGUISHING TOOLS · 3 ITEMS
Distinguishing tools
Tools that decide between Green Sapphire and Synthetic Green Sapphire in practice.
Note: this page is auto-generated from published GIA / CGL reference values. Individual stones, treatments, and synthetics may fall outside these ranges. For a definitive identification, consult an accredited gem laboratory.