Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Category
Antropogenic (Man Made Glass Byproduct)
Browse antropogenic (man made glass byproduct) specimens identified by the Rock Identifier community.
Granite
Granite (Felsic Plutonic Rock)
igneous
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
River Quartz Cobble
Silicon Dioxide (SiO2)
mineral
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Agate (Crazy Lace or Eye Agate)
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Felsic Rock (SiO2 > 69%)
igneous
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Limestone (Grey and White specimens)
Calcium Carbonate (CaCO3)
sedimentary
Rose Quartz
Silicon dioxide (SiO2)
mineral
Agate Nodule / Weathered Chert
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Sedimentary / Mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone (with Manganese staining)
Arenite (composed primarily of SiO2)
sedimentary
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Quartz Vein in Host Rock
Hydrothermal Quartz (SiO2) in Slates/Schists
metamorphic
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2) with miscellaneous inclusions
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Coal
Bituminous or Anthracite coal (carbon-rich sedimentary rock)
sedimentary
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Quartz (Drusy/Crystalline)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite Pebbles
Quartzite (SiO2)
metamorphic
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
sedimentary
Iron-stained Quartzite
Recrystallized Quartz (SiO2) with Hematite/Limonite staining
metamorphic
Sandstone
Arenite
sedimentary
Quartzite with Chlorite
Metamosphosed Quartz Sandstone (SiO2 with (Mg,Fe)3(Si,Al)4O10(OH)2 inclusions)
metamorphic
Sandstone with Tafoni Weathering
Arenite (SiO2 based)
sedimentary
Sandstone (Weathered Pebble)
Arenite (SiO2 primarily)
sedimentary
Feldspar (Orthoclase)
Orthoclase Feldspar (KAlSi3O8)
mineral
Sandstone (Calcareous or Ferruginous)
Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Potassium Feldspar and Quartz
KAlSi3O8 (Potassium Feldspar) and SiO2 (Quartz)
mineral
Sandstone (Stream Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral