Schist
Mica Schist
Category
Browse mineral like byproduct specimens identified by the Rock Identifier community.
Schist
Mica Schist
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron inclusions
Sandstone
Arenite (SiO2 based)
Banded Gneiss
Gneiss
Pegmatite
Igneous Pegmatite
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Sunstone (Feldspar)
(Ca,Na)((Al,Si)2Si2O8) with inclusions of Hematite or Goethite
Malachite
Copper(II) carbonate hydroxide [Cu2CO3(OH)2]
Serpentinite
Serpentinite (Hydrated magnesium iron silicate)
Pegmatite with Schorl (Black Tourmaline) and Mica
Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)
Sandstone
Arenite (primarily SiO2)
Geode half
Geode (often quartz/chalcedony based)
Plume Agate
Silicon Dioxide (SiO2) - Chalcedony Variety
Fluorite
Calcium Fluoride (CaF2)
Quartz with Iron Staining and Chlorite Inclusions
Silicon Dioxide (SiO2)
Gneiss
Gneiss (Metamorphic Rock)
Fluorite
Fluorite (Calcium Fluoride, CaF2)
Schist
Mica Schist
Fossilized Stingray Mouth Plate
Myliobatidae gen. et sp. indet. (e.g., Myliobatis, Aetobatus)
Granite
Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Greenstone with Quartz Veining
Epidiorite or Metabasalt with SiO2 (Quartz) veins
Muscovite Mica
KAl2(AlSi3O10)(OH)2
Granite
Granite (Felsic Plutonic Rock)
Limonite (Yellow Ochre)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
Sandstone
Arenite
Gneiss
Gneiss
Native Copper
Copper (Cu)
Quartz Pebble
Silicon Dioxide (SiO2)
Desert Rose (Barite Rose / Gypsum Rose)
Barium Sulfate (BaSO4) or Hydrous Calcium Sulfate (CaSO4%22H2O)
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
Dendritic Agate
Dendritic Agate (Silicon Dioxide with Manganese or Iron Oxide inclusions, SiO2)
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
Leopardite
Porphyritic Quartz Monzonite or Rhyolite
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
Mixed River Pebbles (Jasper, Hematite, and Quartzites)
Silicon dioxide (Jasper/Quartz) and Iron oxide (Hematite)
Green Chert
Microcrystalline Quartz (SiO2)
Geode (Unopened)
Silicon dioxide with various inclusions (SiO2)
Azurite in Matrix
Azurite (Cu3(CO3)2(OH)2) in Rhyolite or Sandstone matrix