Mineral

Sandstone

Arenite (SiO2 based)

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

Sandstone

Arenite (SiO2 based)

Quartz (Variety: Citrine or Tumbled Chalcedony)

Silicon Dioxide (SiO2)

Nephrite Jade

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

Sandstone

Arenite (SiO2 principal)

Rose Quartz

Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron

Cuprite

Cuprite (Copper(I) oxide, Cu2O)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Peridot

Olivine (Mg, Fe)₂SiO₄

Milky Quartz

Silicon Dioxide (SiO2)

Turquoise

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Pyrite in Matrix (often with Chalcopyrite)

Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)

Muscovite Mica

Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2

Sandstone

Arenite (SiO2 based)

Iolite (Cordierite)

Cordierite (Magnesium iron aluminum cyclosilicate), Mg2Al4Si5O18

Granite

Phaneritic Felsic Igneous Rock (composed of SiO2, KAlSi3O8, NaAlSi3O8)

Granite

Granite (Felsic Plutonic Rock)

Granite

Phaneritic Felsic Igneous Rock

Petrified Wood

Silicified wood (Quartz/Chalcedony - SiO2)

Red Sandstone (Old Red Sandstone)

Ferruginous Sandstone (SiO2 + Fe2O3)

Hag Stone

Porous sedimentary rock (typically Flint, Chert, or Sandstone) with naturally occurring holes

Mica Schist

Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions

Quartzite with inclusions

Quartzite (SiO2)

Granite

Phaneritic intrusive igneous rock

Gneiss

Gneiss (High-grade Metamorphic Rock)

Granite

Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O

Diamond

Carbon (C)

Diorite

Diorite (Intermediate intrusive igneous rock)

Blue Calcite

Calcium Carbonate (CaCO3)

Titanium Quartz (Rough)

Titanium-included Silicon Dioxide (SiO2 + Ti)

Eudialyte

Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)

Green Aventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Rose Quartz

Silicon dioxide (SiO2)

Diamond (in a jewelry setting)

Carbon (C)

Smoky Quartz

SiO2 (Silicon Dioxide)

Green Quartz (Aventurine)

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

Blue Crackle Quartz (Dyed Fire Agate/Quartz)

Silicon Dioxide (SiO2) with artificial dye treatment

Blue Sapphire

Corundum (Al2O3)