Biotite / Black Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
Category
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Biotite / Black Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
Smoky Quartz
Smoky Quartz (SiO2)
Fluorite (Green)
Fluorite (Calcium Fluoride, CaF2)
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Aventurine
Silicon Dioxide (SiO2) with inclusions
Pyrite
Iron Sulfide (FeS2)
Prehnite on Basalt
Prehnite - Ca2Al(AlSi3O10)(OH)2
Olivine
Magnesium Iron Silicate ((Mg, Fe)₂SiO₄)
Yellow Aventurine (specifically a carved crescent moon)
Silicon Dioxide (SiO2) with inclusions
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Moonstone
Orthoclase feldspar (KAlSi3O8)
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
Rose Quartz
Rose Quartz (SiO2 - Silicon Dioxide with trace amounts of titanium, iron, or manganese)
Hypersthene
Hypersthene (formula: (Mg,Fe)SiO3)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Epidote (with Quartz and Feldspar)
Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Rose Quartz
Silicon dioxide (SiO2)
Quartz with Mica inclusions (Pegmatite)
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Amazonite
K(AlSi3O8) - Microcline
Amethyst (Pale/Light Variety)
Quartz (Silicon Dioxide) with Iron impurities - SiO2
Blue Lace Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Granite
Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
Limonite (Iron Stone Concretion)
Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O
Halite
Halite (NaCl)
Basalt with Amygdules
Amygdaloidal Basalt
Rutilated Quartz (with Garnet pendant)
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Mahogany Obsidian
Obsidian (Volcanic Glass) with Hematite/Magnetite inclusions
Granite
Phaneritic Igneous Rock (Granite)
Quartz
Silicon Dioxide (SiO2)
Labradorite (Larvikite variety)
(Na,Ca)(Al,Si)4O8 (Plagioclase Feldspar)
Obsidian
Extrusive igneous volcanic glass (rich in SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Corundum (Sapphire in Host Rock)
Corundum (Aluminum Oxide, Al2O3)
Granite
Phaneritic Acidic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
Granite (Pink/Red)
Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)
Pink Granite
Granite (Phaneritic Quartz-Feldspar Rock)
Raw Citrine
Citrine (Silicon Dioxide - SiO2)