COMPARE GUIDE
Champagne TopazVSSmoky Quartz
Side-by-side comparison of physical properties, fluorescence, and crystal system — to identify by observation.
Decisive distinctionsDECISIVE
- ◎ is higher in Champagne Topaz, giving a numerical distinguishing point.
- ◎ is higher in Champagne Topaz, giving a numerical distinguishing point.
- ◎ is higher in Champagne Topaz, giving a numerical distinguishing point.
- ◎ is higher in Champagne Topaz, 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: Champagne Topaz | B: Smoky Quartz | Verdict |
|---|---|---|---|
| Refractive index (RI) | 1.610–1.638 | 1.544–1.553 | A higher |
| Specific gravity (SG) | 3.50–3.57 | 2.64–2.66 | A higher |
| Mohs hardness | 8.0 | 7.0 | A higher |
| Birefringence | 0.010 | 0.009 | A higher |
| Dispersion | — | — | — |
Optics & fluorescenceOPTICS & UV
| Property | A: Champagne Topaz | B: Smoky Quartz |
|---|---|---|
| Crystal system | 斜方晶系 | 三方晶系 |
| Pleochroism | 中（茶・黄茶） | 弱〜中（茶・赤茶） |
| Chelsea filter | — | inert |
| UV (long-wave) | — | inert |
| UV (short-wave) | inert | inert |
ObservationOBSERVATION
◆Smoky quartz has SG 2.65 — feels markedly lighter in hand at equal size; lower RI (1.544), no , and softer (Mohs 7). The 'smoky topaz' trade name is a misnomer that often disguises smoky quartz.
Color categoriesCATEGORIES
A: Champagne Topaz
Brown
B: Smoky Quartz
Brown
DISTINGUISHING TOOLS · 3 ITEMS
Distinguishing tools
Tools that decide between Champagne Topaz and Smoky Quartz 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.