COMPARE GUIDE
Pyrope GarnetVSNatural Ruby
Side-by-side comparison of physical properties, fluorescence, and crystal system — to identify by observation.
Decisive distinctionsDECISIVE
- ◎ is higher in Natural Ruby, giving a numerical distinguishing point.
- ◎ is higher in Natural Ruby, giving a numerical distinguishing point.
- ◎ is higher in Natural Ruby, 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: Pyrope Garnet | B: Natural Ruby | Verdict |
|---|---|---|---|
| Refractive index (RI) | 1.730–1.760 | 1.762–1.770 | B higher |
| Specific gravity (SG) | 3.65–3.87 | 3.97–4.05 | B higher |
| Mohs hardness | 7.0–7.5 | 9.0 | B higher |
| Birefringence | — | 0.008 | — |
| Dispersion | — | — | — |
Optics & fluorescenceOPTICS & UV
| Property | A: Pyrope Garnet | B: Natural Ruby |
|---|---|---|
| Crystal system | 等軸晶系 | 六方晶系（三方晶系） |
| Pleochroism | — | 強（紫赤・黄赤） |
| Chelsea filter | red | red |
| UV (long-wave) | inert | strong (red) |
| UV (short-wave) | inert | weak (red) |
ObservationOBSERVATION
◆Ruby under LW UV and shows subtle and clear dichroism. Pyrope is inert, singly refractive, and has no dichroism.
Color categoriesCATEGORIES
A: Pyrope Garnet
Red / pink
B: Natural Ruby
Red / pink
DISTINGUISHING TOOLS · 3 ITEMS
Distinguishing tools
Tools that decide between Pyrope Garnet and Natural Ruby 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.