Lapis Lazuli
Lapis Lazuli is a gemstone with the chemical formula Na3Ca(Si3Al)12O24S2. It has a Mohs hardness of 5-5.5 and matte to vitreous luster.
Lapis Lazuli properties
| Type | Gemstone |
|---|---|
| Chemical formula | Na3Ca(Si3Al)12O24S2 |
| Mohs hardness | 5-5.5 |
| Luster | Matte to vitreous |
| Typical colors | Deep blue, azure, with possible golden pyrite inclusions |
| Formation | Metamorphic rock formed from the alteration of limestone and clay-rich sediments |
| Rarity | 7 / 10 |
Mohs hardness 5–5.5 — medium
1 · Talc5 · Apatite10 · Diamond
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