Igneous And Metamorphic

Gneiss (specifically Banded Gneiss)

Gneiss

Banded Gneiss

Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)

Lapis Lazuli

Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)

Blue-and-gold lapis lazuli fragment

Lapis lazuli; lazurite-rich calc-silicate rock (primarily lazurite, with calcite and pyrite)

Greenstone

Metabasalt / Greenschist facies rock

Mica Schist fragment

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3(AlSi3O10)(OH)2)

Gneiss

Gneiss

Greenstone Pebbles (Basalt/Diabase)

Metamorphosed Mafic Rock (Greenstone)

Greenschist

Chlorite schist

Greenstone

Chlorite schist / Meta-basalt

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)

Greenstone / Greenschist

Greenschist (metamorphosed mafic rock)

Gneiss

Gneiss

Gneiss

Gneiss

Greenschist

Greenschist (Chlorite-actinolite schist)

Gneiss (Banded Gneiss)

Gneiss

Banded Gneiss

Gneiss

Pink Granite Gneiss

Granitic Gneiss

Healer's Gold (Pyrite and Magnetite in Schist)

Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist

Greenstone Pebble

Metabasalt (often containing chlorite, actinolite, or epidote)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)

Gneiss

Gneiss

Gneiss (Schistose)

Gneiss

Greenstone / Nephrite Jade

Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)

Ruby Zoisite

Anyolite (Ca2Al3(SiO4)3(OH) + Al2O3:Cr)

Gneiss

Gneiss

Nephrite Jade

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

Greenschist

Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)

Greenstone (Metabaltic/Greenschist)

Chlorite schist / Meta-basalt

Greenstone

Metabasalt (composed mainly of chlorite, epidote, and actinolite)

Schist

Mica Schist

Greenstone (Epidote/Chlorite Schist)

Metabasalt (composed primarily of Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) and Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Glacial Cobble (likely Granitic or Gneissic)

Granite/Gneiss Glacial Erratic

Serpentine

Antigorite, Lizardite, or Chrysotile; (Mg,Fe)3Si2O5(OH)4

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Quartz–mica metamorphic rock, likely schist

Quartz–muscovite/biotite schist; predominantly SiO₂ quartz with phyllosilicate micas

Quartz in Matrix (or Quartz Vein Rock)

Silicon Dioxide (SiO2) with host rock

Black Granite

Phaneritic Mafic Igneous Rock (likely Gabbronorite or Dolerite)

Greenstone with Epidote or Quartz Vein

Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)

Tumbled orbicular granite or granitic gneiss

Granite, chiefly quartz–feldspar–biotite/amphibole; exact variety uncertain from the image

Magnetite / Iron Ore

Magnetite (Fe3O4)

Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)

Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)