Quick Facts
FamilyCorundum
Chemical CompositionAl₂O₃ + Fe, Ti, Cr
Mohs Hardness9
Refractive Index1.76–1.77
Birefringence0.008–0.010
Common Cuts
Oval, Cushion, Round, Emerald
Typical Colors
Blue, Pink, Yellow, Green, Colorless (White Sapphire)
Notable Origins
Sri Lanka, Kashmir, Madagascar, Thailand, Australia
Grading & Buyer’s Guide
Care & Cleaning
FAQs
Gemstone Value Estimator
Educational price estimate based on gem type, weight, and quality attributes.
Diamond grading terms follow GIA 4Cs. Results are indicative only and not a formal appraisal.
1) Stone Basics
2) Diamond Quality (GIA)
2) Colored Gem Quality
3) Certification & Currency
Advanced (Exchange Rates)
Estimated Value
Estimated Range
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Midpoint
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Educational estimate only; market prices vary by vendor, provenance, and lab report specifics.