Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Category
Browse metamorphic or igneous with mineral inclusion specimens identified by the Rock Identifier community.
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Obsidian
Obsidian (principally SiO2 with MgO and Fe3O4)
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Milky Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Orange Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
Granite with Quartz Vein
Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)
Orbicular Granite (specifically Mustard or Yellow Tonalite/Granodiorite)
Orbicular Quartz Diorite / Tonalite
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
Obsidian
Volcanic Glass (predominantly SiO2)
Garnet (specifically Almandine)
Almandine - Fe3Al2(SiO4)3
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)
Gneiss
Gneiss
Greenschist (Greenstone)
Greenschist (Metamorphic rock containing chlorite, actinolite, and epidote)
Mahogany Obsidian
Volcanic Glass (with inclusions of Magnetite or Hematite)
Granitic Quartz with Feldspar
Granite (composed primarily of SiO2 and KAlSi3O8)
Rose Quartz
Crystalline Silicon Dioxide with trace Titanium/Manganese/Iron (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Pyrite in Matrix (likely Quartz or Schist matrix)
Iron Sulfide (FeS2)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
Blue Calcite
Calcium Carbonate (CaCO3)
Smoky Quartz
Silicon Dioxide (SiO2)
Garnet (likely Almandine or Pyrope)
Garnet Group (Fe3Al2Si3O12 or Mg3Al2Si3O12)
Granite
Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
Granite
Granite (a phaneritic intrusive igneous rock)
Scoria (Basaltic Lava Rock)
Vesicular Basalt
Basalt (Vesicular)
Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene
Basalt
Basalt
Basalt with Iron Oxidation
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
River Cobble (likely Basalt or Rhyolite)
Extrusive Igneous Rock (Mafic or Intermediate)
Basalt
Basalt
Mahogany Obsidian
Volcanic glass containing Hematite or Magnetite (SiO2 + Fe2O3)
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F
Quartz
Silicon Dioxide (SiO2)