Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
cubicuncommonRock (composed primarily of Lazurite, a tectosilicate)
Lapis Lazuli
(Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)] (primary component: Lazurite)
A vibrant deep blue rock, often speckled with golden pyrite inclusions and white calcite veins, showcasing its characteristic rich color and texture.
Lapis Lazuli Physical Properties
Mohs Hardness
5Crystal System
cubicLuster
vitreousStreak Color
light blueCleavage
imperfect (for Lazurite)Fracture
uneven to conchoidalSpecific Gravity
2.75Colors
deep blue, gold, whiteTransparency
opaqueType Locality
Sar-e-Sang District, Koksha Valley, Badakhshan Province, AfghanistanMineral Group
Rock (composed primarily of Lazurite, a tectosilicate)Uses
gemstone, ornamental stone, pigment (ultramarine)Associated Minerals
lazurite, pyrite, calcite (from marble)Rarity
uncommonGeological Context
Lapis Lazuli forms through contact metamorphism of limestone or marble, where sulfur-rich fluids interact with aluminum-rich minerals, typically in high-temperature, low-pressure environments.
