Mineral Variety
Corundum (Star Variety)
Hardness (Mohs)
9.0 Mohs Scale
Refractive Index
1.762 - 1.770
Primary Source
Ratnapura (Sri Lanka), Madagascar
History & Heritage
Exhibits asterism—a rare 6-ray star reflection caused by tiny needle-like inclusions of rutile aligned along the crystal axes. Sri Lankan star sapphires are legendary, including the Star of India and the Logan Sapphire.
Sri Lanka’s geological composition is unique, containing some of the oldest pre-Cambrian rocks on earth. Over millions of years of metamorphic growth under extreme pressure and temperature, these premium gemstone crystals were formed, washed down from mountain heights into the valleys where they are ethically hand-mined today.
Quality & Valuation
- Color Purity: The primary value driver. Vivid, highly saturated tones with minimal grey or brown hues are the most prized.
- Clarity: High transparency and brilliance. Minimal visible inclusions ensure the maximum light play and adularescence.
- Ethical Sourcing: Every piece shown is verified to be extracted via sustainable, low-impact local mining operations in Sri Lanka.
- Certification: All high-value items come accompanied by official certificates from globally recognized gem testing laboratories.
Marketplace
AVAILABLE STAR SAPPHIRES
◆
Star Sapphire2.00 ct
Serendib Star Sapphire
Rs 75,000
Certified
Star Sapphire4.10 ct
Fancy Grey Moonstone
Rs 8,500