Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
Quartz (Rose or Clear variety)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
Quartz with Mica
Silicon Dioxide (SiO2) with Phyllosilicates (Mica)
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2) with Iron Hydroxide/Oxide (Limonite/Goethite)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide staining)
Chalcedony (Agate / Chert)
Silicon Dioxide (SiO2)
Quartz with Host Rock Matrix
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon dioxide (SiO2)
Quartz
SiO2 (Silicon Dioxide)
Quartz (Rose or Milky Quartz)
Silicon Dioxide (SiO2)
Jasper (Green Jasper/Heliotrope variety)
Silicon Dioxide (SiO2)
Pyrite-rich Ore
Pyrite (FeS2) with secondary minerals
Chert (Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Mica Schist with Quartz
Crystalline Schist (SiO2 + KAl2(AlSi3O10)(OH)2)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Smoky Quartz / Chalcedony
Silicon Dioxide (SiO2)
Milky Quartz
Silicon dioxide (SiO2)
Smoky Quartz Cluster
Smoky Quartz (Silicon Dioxide - SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Tumbled Quartz
Silicon Dioxide (SiO2)
Chert / Flint Jasper
Microcrystalline Quartz (SiO2)
Quartz Pebble (Beach Chalcedony)
Silicon Dioxide (SiO2)
Chalcedony / Quartz Nodule (Agate Pebble)
Silicon Dioxide (SiO2)
Granite Pebble
Intrusive Igneous Rock
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide impurities
Yellow Chalcedony (Agate or Citrine Quartz)
Silicon Dioxide (SiO2)
Quartzite Geode or Crystalline Quartz Node
Silicon Dioxide (SiO2)
Golden Healer Quartz
Ferruginous Quartz (SiO2 with Fe2O3 inclusions)
Amethyst Quartz
Amethyst (Silicon Dioxide, SiO2)
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Migmatite
Migmatite (Mixed metamorphic-igneous rock)
Agate (specifically, multi-colored or pastel-dyed agate)
Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
Quartz with Chalcopyrite and Pyrite
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
Sandstone
Sandstone (SiO2 dominated clastic sedimentary rock)
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
Quartz (Clear or Milky)
Silicon Dioxide (SiO2)