Mineral_rock

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Blue Apatite

Apatite (Ca5(PO4)3(F,Cl,OH))

Vanadinite

Pb5(VO4)3Cl

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Sandstone

Arenite (Siliclastic sedimentary rock), SiO2 + various minerals

Petrified Wood

Silicified Wood (SiO2)

Dalmatian jasper

Dalmatian stone, typically a leucocratic alkali-feldspar-rich porphyritic igneous rock with black arfvedsonite or aegirine inclusions

Gneiss

Gneiss

Azurite and Malachite on Matrix

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

Limestone or Sandstone Cobble

Sedimentary rock (Calcium carbonate or Quartz based)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz with Tourmaline inclusions

Silicon Dioxide (SiO2) with Tourmaline needles

Quartz Pebble

Silicon Dioxide (SiO2)

Lapis Lazuli (polished cabochon)

Lazurite-rich metamorphic rock (approx. Na6Ca2Al6Si6O24(SO4,S,Cl)2)

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))

Lapis Lazuli

Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Limonite with Opal infusion

FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)

Lapis Lazuli (Raw)

Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S

Lapis Lazuli

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

Lapis Lazuli

Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Polished black obsidian pyramid/block

Obsidian — natural volcanic glass, chiefly rhyolitic silica (approximately 70–75% SiO₂)

Quartz with Host Rock

Silicon Dioxide (SiO2)

Sandstone (Iron-stained)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Petrified Wood

Silicified wood (SiO2)

Fluorite

Calcium Fluoride (CaF2)

Banded Sandstone (River Cobble)

Arenite Sandstone with heavy mineral layering

Turquoise

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)

Diorite (Igneous rock, intrusive, intermediate composition)

Epidote

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Fossil shark teeth

Likely fossilized shark teeth, possibly Carcharhiniformes or related sharks; exact species cannot be determined from the photo.

Quartz Geode

Silicon Dioxide (SiO2)

Bismuthinite with Chalcopyrite and Quartz

Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)

Pyrite

Iron Sulfide (FeS2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz with Chlorite or Hornblende inclusions

Silicon dioxide (SiO2) with phyllosilicate or amphibole inclusions

Quartz and Quartzite

Silicon Dioxide (SiO2)