Granite
Felsic intrusive igneous rock
Category
Browse mineral on igneous rock specimens identified by the Rock Identifier community.
Granite
Felsic intrusive igneous rock
Copper Ore
Cupriferous Rock / Mixed Mineral Matrix
Quartz-veined Basalt or Diabase Pebble
Igneous rock with hydrothermal quartz vein
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
Quartz with Mica
Silicon Dioxide (SiO2) with Mica group inclusions
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
Mixed polished rock/mineral specimens
Indeterminate from image; likely quartz-bearing material with iron-oxide staining and possibly mica-rich schist
Granite
Felsic intrusive igneous rock
Quartz (Moss-covered)
Silicon Dioxide (SiO2)
Mineral and Rock Collection (Assorted)
Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine
Weathered granitic rock
Granite, likely quartz–feldspar–mica aggregate
Basalt with Quartz/Calcite Veins
Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)
Banded Gneiss Pebble
Gneiss (Metamorphic Rock)
Granite
Phaneritic intrusive igneous rock
Amygdaloidal Basalt with Zeolite/Quartz Infill
Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)
Dalmatian Jasper
Peralkaline Quartz-feldspathic Rock (Arfvedsonite-bearing)
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
Granite
Granite (Plutonic Igneous Rock)
Granite
Felsic intrusive igneous rock
Granite
Phaneritic Felsic Igneous Rock
Granite
Phaneritic Felsic Intrusive Igneous Rock
Crushed Granite Gravel
Granite (Plagioclase feldspar, Quartz, Alkali feldspar, Biotite)
Clear Quartz (Faceted Crystal)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Granite Gneiss
Granitic Gneiss
Granite Pebbles
Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)
Basalt Pebble
Extrusive Igneous Rock
Wishing Stone (Quartz-veined Porphyritic Basalt)
Igneous rock with quartz vein (SiO2)
Quartz Vein in Host Rock
Quartz (SiO2) in Mafic or Sedimentary Matrix
Basalt Pebble
Aphanitic Igneous Rock / Basalt
Basalt
Basalt
Quartz Druzy
Crystalline Silicon Dioxide (SiO2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
Granite
Granite
Granite
Granite (Phaneritic Igneous Rock)
Potassium Feldspar (Microcline / Orthoclase)
KAlSi3O8
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
Quartz
Silicon Dioxide (SiO2)
Quartz in Basalt (Xenocryst)
Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock
Tumbled Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)