Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Sedimentary (Chemically Precipitated) Or Metamorphic
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
Pyrite
Iron Sulfide (FeS2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst and Hematite Bracelet
Amethyst (SiO2) and Hematite (Fe2O3)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Unidentified Rock Fragment
Unknown
Rock
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Turquoise (beads)
Turquoise; CuAl6(PO4)4(OH)8·4H2O
Mineral
Quartz (Riverstone / Cobble)
Silicon Dioxide (SiO2)
mineral
Azurite
Azurite (Cu3(CO3)2(OH)2)
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Black Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Banded Jasper (possibly "Picture Jasper")
Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)
Sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate)
Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Organic Diamond/Gemstone (often associated with Sedimentary sequences)
Banded Agate (specifically Sardonyx)
Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz
mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Halite
Sodium Chloride (NaCl)
Mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Granitic Gneiss
Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)
metamorphic
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Fuchsite Quartzite
Fuchsite-bearing Quartzite
Metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Red Jasper
SiO2 (Silicon Dioxide with Iron inclusions)
sedimentary
Gold
Aurum (Elemental Gold, Au)
Mineral, Metal (element)
Basalt River Rock
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Milky Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Gneiss
Gneiss
metamorphic