Welcome To Ashstone Exports LTD

  • Nigeria

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Welcome to Ashstone Exports LTD

At Ashstone Exports Ltd, we are committed to sustainability, ethical sourcing, and long-term growth. We exist to unlock Nigeria’s economic potential and deliver value to partners across continents. Our story is one of quality, integrity, and ambition—driven by a belief that Africa’s resources can fuel global industries.

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  • House 2 Amasom 18 Bishop Edward Benson street Ogudu GRA phase 2

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Lapis Lazuli

Ashstone Exports Ltd

Lapis Lazuli

Property Specification
Chemical Formula Na₈Al₆Si₆O₂₄(S,SO₄)₂ (Main components: Lazurite, Calcite, Pyrite)
Crystal System Cubic (mainly massive, granular)
Hardness (Mohs) 5 – 5.5
Specific Gravity 2.7 – 2.9
Cleavage None
Fracture Conchoidal to uneven
Luster Vitreous to dull (can have a waxy appearance due to calcite)
Transparency Opaque
Refractive Index 1.5 – 1.7
Color Deep blue, with gold flecks (from pyrite inclusions)
Streak Blue
Tenacity Brittle
Crystal Habit Massive, granular, and sometimes forms nodules