Mineral

Sandstone (Ferruginous)

Arenite with Iron Oxide cement

Fossilized Fish (Lepidotes)

Lepidotes sp. (Order: Lepisosteiformes)

Glauconite (Glauconitic Sandstone)

Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]

Chrysocolla (with Quartz and Azurite)

Hydrated copper phyllosilicate mineral [Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)]

Coprolite

Coprolite

Lava Stone and Chakra Beads

Basalt (with various mineral/synthetic beads)

Greenschist (Greenstone)

Greenschist (Metamorphic rock containing chlorite, actinolite, and epidote)

Quartzite with inclusions

Metamorphic Quartzite (SiO2 with accessory minerals)

Tumbled Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Amygdaloidal Basalt

Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Pink Himalayan Salt (Halite)

Halite - NaCl (Sodium Chloride) with trace Iron Oxide and Magnesium

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (composed primarily of Fluorapatite)

Barite

Barium Sulfate (BaSO4)

Pyrite

Iron Sulfide (FeS2)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Gneiss (Augen Gneiss)

Augen Gneiss

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)

Blue Sapphire (Faceted)

Corundum (Al2O3)

Milky Quartz Chip

Silicon Dioxide (SiO2)

Green Aventurine

SiO2

Basalt with Amygdules

Amygdaloidal Basalt

Granite

Granite (a common igneous rock)

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

Diorite

Diorite (intermediate intrusive igneous rock)

Granite

Granite (High-silica plutonic rock)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss with Orthoclase Feldspar

Gneissic Metamorphic Rock with K-Feldspar inclusions

Ruby (varieties of Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Pyrite and Quartz Agglomerate

Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)

Banded Slate

Slate (Metamorphosed Siltstone/Mudstone)

Gneiss

Gneiss (pronounced 'nice')

Schist

Mica Schist

Granite

Phaneritic plutonic rock (SiO2 + Al2O3)

Granite

Granite (Phaneritic igneous rock)

Granite Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Granite

Granite (Felsic Plutonic Rock)

Planet Earth

Gaia (Silicate Terrestrial Planet)

Sandstone (Red)

Arenite (primarily Quartz, SiO2, with Iron Oxide cement)

Ironstone Concretion (Limonite/Hematite Nodules)

Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)

Ferruginous Sandstone (Red Sandstone)

Arenite with Hematite/Limonite cement

Banded Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (SiO2 with Iron Oxide impurities)