COMPARE GUIDE
Demantoid GarnetVSMelanite Garnet
Side-by-side comparison of physical properties, fluorescence, and crystal system — to identify by observation.
Physical propertiesPROPERTIES
| Property | A: Demantoid Garnet | B: Melanite Garnet | Verdict |
|---|---|---|---|
| Refractive index (RI) | 1.880–1.895 | 1.855–1.895 | Overlap |
| Specific gravity (SG) | 3.82–3.85 | 3.70–3.90 | Overlap |
| Mohs hardness | 6.5–7.0 | 6.5–7.0 | Nearly equal |
| Birefringence | — | — | — |
| Dispersion | 0.057 | — | — |
Optics & fluorescenceOPTICS & UV
| Property | A: Demantoid Garnet | B: Melanite Garnet |
|---|---|---|
| Crystal system | 等軸晶系 | 等軸晶系 |
| Pleochroism | — | — |
| Chelsea filter | red / pink | — |
| UV (long-wave) | inert | — |
| UV (short-wave) | inert | inert |
ObservationOBSERVATION
◆Demantoid is the green chromium-rich variety of the same mineral (andradite); melanite is the black titanium-rich variety — same species, different chromophore.
Color categoriesCATEGORIES
A: Demantoid Garnet
Green
B: Melanite Garnet
Black / gray
DISTINGUISHING TOOLS · 3 ITEMS
Distinguishing tools
Tools that decide between Demantoid Garnet and Melanite Garnet 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.