Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Category
Mineral, Specifically A Variety Of Quartz
Browse mineral, specifically a variety of quartz specimens identified by the Rock Identifier community.
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartz with Mica (Gneissic or Pegmatitic origin)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(F,OH)2)
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Coarse-grained Quartz with Feldspar inclusions
Crystalline Quartz (SiO2) with Orthoclase/Plagioclase Feldspar inclusions
igneous
Rutilated Quartz
Quartz (SiO2) with Rutile inclusions (TiO2)
Mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Chert Nodule with Cortex)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite Pebble
Metamorphosed Sandstone (SiO2)
metamorphic
Gneiss (specifically Granitic Gneiss)
Gneissic Metamorphic Rock
metamorphic
Granite (specifically Rapakivi Granite)
Phaneritic Felsic Igneous Rock (Granite)
igneous
Ruby (set in a gold pendant)
Ruby (Variety of Corundum, Al2O3)
mineral
Chalcedony
Chalcedony (SiO2)
mineral
Quartz Vein in Host Rock (Likely Slate or Shale)
Hydrothermal Quartz (SiO2) in Pelitic host rock
metamorphic
Chert (Pink Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Labradorite
Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8
mineral
Chert (often called Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varieties include Flint and Jasper)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with iron oxide inclusions/staining (Limonite/Hematite)
Mineral
Chert (often called Flint or River Stone)
Chert (SiO2)
sedimentary
Quartz (Milky or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Ferrocoke or Slag
Anthropogenic pyrometallurgical residue
igneous
Iceland Spar (Optical Calcite)
Calcite (Calcium Carbonate, CaCO3)
mineral
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
Igneous
Chert (Tan/Grey variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Arrowhead/Tool variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Iron-rich variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Yellow/Tan Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary