COMPARE GUIDE
Demantoid GarnetVSSphene (Titanite)
Side-by-side comparison of physical properties, fluorescence, and crystal system — to identify by observation.
Decisive distinctionsDECISIVE
- ◎ is higher in Demantoid Garnet, giving a numerical distinguishing point.
- ◎ is higher in Demantoid Garnet, giving a numerical distinguishing point.
- ◎ is higher in Demantoid Garnet, giving a numerical distinguishing point.
Note: properties whose numeric ranges do not overlap are auto-extracted. Both are measurable with a refractometer or heavy-liquid bath.
Physical propertiesPROPERTIES
| Property | A: Demantoid Garnet | B: Sphene (Titanite) | Verdict |
|---|---|---|---|
| Refractive index (RI) | 1.880–1.895 | 1.843–2.110 | Overlap |
| Specific gravity (SG) | 3.82–3.85 | 3.45–3.55 | A higher |
| Mohs hardness | 6.5–7.0 | 5.0–5.5 | A higher |
| Birefringence | — | 0.105 | — |
| Dispersion | 0.057 | 0.051 | A higher |
Optics & fluorescenceOPTICS & UV
| Property | A: Demantoid Garnet | B: Sphene (Titanite) |
|---|---|---|
| Crystal system | 等軸晶系 | 単斜晶系 |
| Pleochroism | — | 強（黄緑・茶・橙） |
| Chelsea filter | red / pink | inert |
| UV (long-wave) | inert | inert |
| UV (short-wave) | inert | inert |
ObservationOBSERVATION
◆Sphene shows extreme nclusions, with no .
Color categoriesCATEGORIES
A: Demantoid Garnet
Green
B: Sphene (Titanite)
Yellow / orange / Green / Brown
DISTINGUISHING TOOLS · 3 ITEMS
Distinguishing tools
Tools that decide between Demantoid Garnet and Sphene (Titanite) 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.