mineral
Lapis Lazuli and Moss Agate
(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2 and SiO2
AI-generated identification · may be incorrectLapis Lazuli has a Mohs hardness of 5-6, deep blue color, and vitreous to greasy luster. Moss Agate has a hardness of 6.5-7, green dendritic inclusions, and a waxy luster.
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Physical properties
Lapis Lazuli has a Mohs hardness of 5-6, deep blue color, and vitreous to greasy luster. Moss Agate has a hardness of 6.5-7, green dendritic inclusions, and a waxy luster.
Formation & geological history
Lapis lazuli forms through contact metamorphism of limestone. Moss agate forms from weathered volcanic or metamorphic rocks where silica-rich water deposits chalcedony.
Uses & applications
Used primarily in jewelry, decorative carvings, and as lapidary beads.
Geological facts
Lapis lazuli was prized by ancient Egyptian pharaohs who ground it into powder for eyeshadow and pigments. Moss agate is not a true agate since it lacks concentric banding, but is a type of chalcedony.
Field identification & locations
Identified by its distinct royal blue color with pyrite flecks (lapis) or moss-like green inclusions (agate). Commonly found in Afghanistan, Russia, and the USA.
