mineral
Lapis Lazuli and Green Aventurine
(Na,Ca)8(AlSi)12(SO4,S,Cl)2 and SiO2
AI-generated identification · may be incorrectLapis lazuli hardness is 5-5.5 with vitreous to greasy luster. Green aventurine hardness is 7 with vitreous luster and distinct platy glitter from fuchsite inclusions.
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Physical properties
Lapis lazuli hardness is 5-5.5 with vitreous to greasy luster. Green aventurine hardness is 7 with vitreous luster and distinct platy glitter from fuchsite inclusions.
Formation & geological history
Lapis lazuli forms through contact metamorphism of limestone, while aventurine forms in quartz veins and pegmatites with mineral inclusions.
Uses & applications
Used primarily in jewelry, beads, ornamental carvings, and holistic collecting.
Geological facts
Lapis lazuli has been prized since antiquity, notably used by ancient Egyptians for burial amulets and ground into ultramarine pigment.
Field identification & locations
Easily identified by deep blue shades with golden pyrite flecks for lapis, and translucent green with shimmering mica flakes for aventurine.
