House 2 Amasom 18 Bishop Edward Benson street Ogudu GRA phase 2
Welcome To Ashstone Exports LTD
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Nigeria
Ashstone Exports Ltd is proud to be one of the leading Sapphire suppliers & exporter from Nigeria, offering high-quality natural Sapphires known for their deep blue brilliance and exceptional hardness. Mined from Nigeria's mineral-rich zones, our Sapphires are available in various shades including blue, pink, yellow, and green, with excellent transparency and minimal inclusions. We supply both rough and cut Sapphires, tailored to the needs of jewelers, gemstone dealers, and collectors across the globe. Each stone is ethically sourced, professionally graded, and carefully packed to preserve its natural beauty and value.
Recognized as the best quality Sapphire supplier & exporter, Ashstone Exports guarantees authenticity, competitive pricing, and timely international delivery. Whether you require bulk quantities or specialized selections, we offer flexible solutions backed by trust and industry expertise. Choose Ashstone Exports for genuine Nigerian Sapphires that radiate quality and elevate your collection or product line.
Property | Specification |
Chemical Formula | Al₂O₃ (Aluminum Oxide) |
Crystal System | Trigonal (Hexagonal) |
Hardness (Mohs) | 9 |
Specific Gravity | 3.95 – 4.03 |
Cleavage | None (parting may occur) |
Fracture | Conchoidal to uneven |
Luster | Vitreous |
Transparency | Transparent to opaque |
Refractive Index | 1.762 – 1.770 |
Color | Typically blue; also pink, yellow, green, orange, purple, and colorless |
Streak | White |
Tenacity | Brittle |
Crystal Habit | Tabular, prismatic, or bipyramidal crystals |
Pleochroism | Strong in colored varieties (especially blue sapphires) |
Birefringence | 0.008 – 0.010 |