Sandstone
Clastic sedimentary rock (primarily SiO2)
Category
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Sandstone
Clastic sedimentary rock (primarily SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
Granodiorite
Granodiorite (containing Plagioclase, Quartz, and K-feldspar)
Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
Pegmatite
Coarse-grained Igneous Rock (Granitic Pegmatite)
Eudialyte
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
Snowflake Obsidian
Volcanic glass containing Spherulites (SiO2)
Amygdaloidal Basalt
Basalt with secondary amygdule minerals (likely Epidote or Chlorite)
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
Carnelian
Chalcedony (SiO2) with Iron Oxide impurities
Basalt with Epidote Veins
Mafic Igneous Rock (Basalt)
Gold
Aurum (Au)
Botryoidal Pyrite
Iron Sulfide (FeS2)
Milky Quartz
Silicon Dioxide (SiO2)
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
Quartz (chalcedony variety) or Limestone with Quartz Veins
SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)
Sandstone
Arenite (SiO2 primarily)
Sandstone
Arenite (SiO2 based)
Amazonite
Potassium Feldspar (KAlSi3O8)
Emerald (Beryl)
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
Amazonite
Potassium Feldspar (KAlSi3O8)
Olivine-bearing Basalt / Scoria
Mafic Igneous Rock (primarily (Mg, Fe)2SiO4)
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
Sandstone (likely Siltstone or fine-grained Sandstone)
Sedimentary Rock (Clastic)
Limonite/Hematite Ironstone
Goethite-rich Ironstone (FeO(OH) · nH2O)
Granite
Phaneritic Felsic Igneous Rock
Smoky Quartz on Feldspar (Granite Pegmatite)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)
Limonite
Limonite (FeOO·nH2O)
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2)
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
Smoky Quartz
Smoky Quartz (SiO2: Silicon Dioxide)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Green Moss Agate
Agate (Silicon Dioxide - SiO2 with inclusions of Manganese/Iron oxides)
Blue Lace Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
Quartz (variety of colors)
SiO2 (Silicon Dioxide)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)