Organic Mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Milky Quartz with Chlorite inclusions

Silicon Dioxide (SiO2) with Chlorite group minerals

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Chakra Tumbled Stone Set

Various (including Amethyst [SiO2], Sodalite [Na8(Al6Si6O24)Cl2], Green Aventurine [SiO2], Red Jasper [SiO2], etc.)

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Amygdaloidal Basalt with Zeolite/Quartz Infill

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

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Turquoise

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

Red Sandstone

Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Turquoise

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

Fossilized Bone Fragment

Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)

Ironstone (with Limonite/Goethite)

Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O and Hematite Fe2O3)

Azurite and Malachite on Matrix

Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2

Brown Sandstone

Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Botryoidal Goethite

Goethite (α-Fe3+O(OH))

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Orbicular Granite

Orbicular Granitoid

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Tiger's Eye

Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2

Sandstone (likely River-tumbled Picture Sandstone)

Arenite (predominantly SiO2 with iron oxide impurities)

Pyrite

Iron Sulfide (FeS2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Green Calcite

Calcium Carbonate (CaCO3)

Ferruginous Sandstone (Gozzan)

Iron-rich clastic sedimentary rock with Limonite/Goethite

Botryoidal Chalcedony with Calcite

Chalcedony (SiO2 with accessory minerals, likely CaCO3)

Himalayan Salt (Halite)

Halite (NaCl) with trace minerals

Green Calcite

Calcium Carbonate (CaCO3)

Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F

Bauxite (Pisolitic Bauxite)

Bauxite (mixture of Hydrous Aluminum Oxides)

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Pink/Orange Variety)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Rough Quartz (Alluvial Pebbles)

Silicon Dioxide (SiO2)

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Quartz (Gravel fragment)

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)