Sphene
Known for its exceptional dispersion which exceeds that of diamond, giving it incredible fire.
Physical & Optical Properties
RI Range1.843–2.110
SG Range3.45–3.55
SG Typical3.53
Hardness (Mohs)5–5.5
Crystal SystemMonoclinic
Optic CharacterDR Biaxial (+)
Birefringence0.100
Dispersion0.051
Fluorescence LWInert
Fluorescence SWInert
Chelsea FilterInert
PleochroismStrong Trichroic
ColorsGreen, Yellow Orange, Brown
SpeciesTitanite
Key Differentiators
- Extreme dispersion (fire)
- Extreme birefringence and facet doubling
- Strong pleochroism
Treatments
- Heat Treatment (green/yellow → reddish/orange)
Price Context
Natural — low ($/ct)$50
Natural — high ($/ct)$400
NotePer carat; titanite; exceptional fire and dispersion; green to yellow-green most common
Price context is approximate. GemID is not an appraisal tool. Results are indicators, not certified valuations.
About Sphene
Known for its exceptional dispersion which exceeds that of diamond, giving it incredible fire.
Identifying a sphene? GemID walks through these tests in order — RI, SG, fluorescence, and more.
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