Metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Greenstone

Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Unakite

Epidotized Granite

Quartzite with Quartz Vein

Metamorphosed sandstone (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Tiger's Eye (Unpolished)

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartzite (with Iron Staining)

Quartzite (predominantly SiO2)

Quartzite (specifically Milky Quartz variety)

Quartz (SiO2)

Quartzite

Quartzite (primarily SiO2)

Nephrite Jade

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)

Charoite

Charoite, K(Ca,Na)2Si4O10(OH,F)·H2O

Unakite

Epidotized Granite

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2

Unakite

Unakitized granodiorite / Quartz-Epidote-Feldspar rock

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Unakite (Epidotized Granite)

Epidote-Feldspar-Quartz Rock

Greenstone (Greenstone River Pebble)

Greenschist (metamorphosed mafic igneous rock)

Aventurine (specifically Green Aventurine)

Silicon Dioxide (Quartz) with inclusions of Fuchsite; SiO2 + K(Al,Cr)2AlSi3O10(OH)2

Quartzite

Quartzite (SiO2)

Marble (Carrara Marble style)

Recrystallized Calcite (CaCO3)

Quartzite

Quartzite (primarily SiO2)

Lapis Lazuli

Complex mixture of Lazurite ((Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2), Calcite, and Pyrite

Quartzite

Quartzite (primarily SiO2)

Mica Schist

Mica Schist

Quartzite

Quartzite (composed mainly of SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Lapis Lazuli

Lapis Lazuli (Complex silicate mineral mix including Lazurite, Pyrite, and Calcite)

Lapis Lazuli

Sodalite-rich Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Nuummite

Nuummite (complex silicate composed of Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)

Aventurine (Green)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

River Quartz Pitting / Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Unakite

Epidotized Granite

Quartzite (Ferruginous)

Quartzite (major component SiO2 with Fe2O3 impurities)

Schist

Mica Schist

Kyanite (Purple variety)

Kyanite (Al₂SiO₅)