Minerals

Greenstone (Greenschist facies)

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Quartz / Quartzite

Silicon Dioxide (SiO2)

Granite

Phaneritic Felsic Igneous Rock

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Ferruginous Chert

Microcrystalline Quartz (SiO2) with Iron Oxides

Limonite (with Pyrite)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Schist

Chlorite-Mica Schist

Nephrite Jade

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone with Manganese Oxide Patina

Clastic Sedimentary Rock (primarily SiO2)

Malachite and Azurite on Gossan (Ironstone Matrix)

Cu2CO3(OH)2 (Malachite) on FeO(OH)·nH2O (Limonite/Gossan)

Chakra Stone (Composite / Man-made Bonded Gemstones)

Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)

Red Sandstone

Quartz Arenite (with Iron Oxide)

Orange Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Greenstone / River Jadeite pebble

Metavolcanic rock / Chlorite or Actinolite-rich schist

Schist (specifically Mica Schist)

Mica Schist (primarily composed of Muscovite KAl2(AlSi3O10)(OH)2 and Biotite)

Schist

Chlorite/Mica Schist

Quartz Geode

SiO2 (Silicon Dioxide)

Chrysocolla in Matrix

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Silicate/Secondary Copper Mineral)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz Pebble

Silicon Dioxide (SiO2)

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Fluorite (Green)

Calcium Fluoride (CaF2)

Quartz Pebble

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

Hydrous ferric oxides (FeO(OH)·nH2O)

Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Ochre / Limonite

Limonite (FeO(OH)·nH2O)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz (Grain)

Silicon Dioxide (SiO2)

Mahogany Obsidian

Obsidian with Hematite inclusions (SiO2 + Fe2O3)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Limonite (Ironstone Concretion)

Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)

Chrysocolla

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Hydrated Copper Phyllosilicate)

Granite

Granite (Felsic Intrusive)

Diorite

Phaneritic Intermediate Plutonic Rock (Diorite)

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Amygdaloidal Basalt with Zeolite/Quartz Infill

Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)