Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Category
Mineral Side Rock
Browse mineral side rock specimens identified by the Rock Identifier community.
Learn about Mineral Side Rock in the encyclopedia
View all →
Quartz Druzy (on Calcedony/Quartz base)
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (Lava Rock)
Aphanitic Mafic Igneous Rock
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Seam Agate
Agate (Banded variety of Chalcedony, SiO2)
mineral
Quartz with Limonite Staining
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Herkimer Diamond
Quartz (Silicon Dioxide) - SiO2
mineral
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
mineral
Obsidian
Obsidian (Volcanic Glass, complex silicate)
igneous
Black Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Sedimentary rock
Quartz Geode (partially formed/chalcedony with iron staining)
Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides
Mineral/Sedimentary Rock Feature
Snowflake Obsidian
Obsidian with Spherulitic Cristobalite (SiO2)
igneous
Granite Cobble
Felsic Intrusive Igneous Rock (Granite)
igneous
Granite
Granite
igneous
Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Quartz (Milky variant)
Silicon Dioxide (SiO2)
mineral
Agate (Crazy Lace or Eye Agate)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium or Manganese
mineral
Chert Concretion (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (CaCO3/SiO2 cemented quartz)
sedimentary
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2 with various lithic fragments)
sedimentary
Sandstone (Water-worn)
Arenite
sedimentary
Riverstone (Sandstone Pebble)
Arenite (SiO2 with various lithic fragments)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Jasper with Quartz Veins
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Mica (Biotite and Muscovite) in Matrix
Potassium aluminum silicate with iron/magnesium (KAl2(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(F,OH)2)
igneous
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Okenite (in Zeolite matrix)
Okenite (CaSi2O5 · 2H2O)
mineral
Quartz crystals on Basalt
SiO2 (Quartz) on Mafic Igneous Rock (Basalt)
igneous
Vesicular Basalt with Amygdaloidal Infill
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
igneous
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral