Sphene
Last updated: April 2026
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.
Measurement Guides
Identifying a sphene? GemID walks through these tests in order — RI, SG, fluorescence, and more.
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