COMPARE GUIDE
CitrineVSYellow Topaz
Side-by-side comparison of physical properties, fluorescence, and crystal system — to identify by observation.
Decisive distinctionsDECISIVE
- ◎ is higher in Yellow Topaz, giving a numerical distinguishing point.
- ◎ is higher in Yellow Topaz, giving a numerical distinguishing point.
- ◎ is higher in Yellow Topaz, giving a numerical distinguishing point.
- ◎ is higher in Yellow 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: Citrine | B: Yellow Topaz | Verdict |
|---|---|---|---|
| Refractive index (RI) | 1.544–1.553 | 1.629–1.638 | B higher |
| Specific gravity (SG) | 2.64–2.66 | 3.50–3.57 | B higher |
| Mohs hardness | 7.0 | 8.0 | B higher |
| Birefringence | 0.009 | 0.010 | B higher |
| Dispersion | — | — | — |
Optics & fluorescenceOPTICS & UV
| Property | A: Citrine | B: Yellow Topaz |
|---|---|---|
| Crystal system | 三方晶系 | 斜方晶系 |
| Pleochroism | 弱 | 中（黄・無色） |
| Chelsea filter | inert | inert |
| UV (long-wave) | inert | weak (yellow / orange) |
| UV (short-wave) | inert | inert |
ObservationOBSERVATION
◆Yellow topaz has much higher SG (~3.5) and stronger . A hand SG test or polariscope reading separates them quickly.
Color categoriesCATEGORIES
A: Citrine
Yellow / orange
B: Yellow Topaz
Yellow / orange
DISTINGUISHING TOOLS · 3 ITEMS
Distinguishing tools
Tools that decide between Citrine and Yellow Topaz 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.