Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
Category
Browse metamorphic, likely sedimentary with quartz veins specimens identified by the Rock Identifier community.
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
Quartz-veined Siltstone
Siltstone with Quartz (SiO2) veins
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Milky Quartz with Mica inclusions
Quartz (Silicon Dioxide, SiO2)
Chalcedony (Common Agate)
Silicon Dioxide (SiO2)
Calcite with iron staining
Calcium Carbonate (CaCO3)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Chert (containing Iron Oxide spots)
Microcrystalline Quartz (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Aventurine (Green Aventurine)
Quartz with Fuchsite Inclusions (SiO2)
Sandstone (clastic)
Clastic Sedimentary Rock (primarily composed of SiO2)
Sandstone (likely Quartzose type)
Clastic sedimentary rock (primarily SiO2)
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
Chalcedony Nodule (Commonly known as Agate or Chert)
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Pyrite (on Shale/Matrix)
Iron Disulfide (FeS2)
Granite
Granite (a felsic intrusive igneous rock)
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
River Rock (likely Quartzite or Quartz-rich Siltstone)
Quartzite (SiO2)
Quartz (variety of colors)
SiO2 (Silicon Dioxide)
Chert (Jasper variety)
Silicon dioxide (SiO2) - Microcrystalline Quartz
White Quartz (Tumbled)
Quartz (Silicon Dioxide, SiO2)
Chalcedony with inclusions (Agate/Quartz)
Silicon Dioxide (SiO2)
Citrine
Yellow Quartz (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartz (Milky to Clear)
Silicon Dioxide (SiO2)
Chert (Jasper-rich)
Microcrystalline/Cryptocrystalline Quartz (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Quartz-veined Sedimentary Rock
Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)
Quartz on Matrix
Silicon Dioxide (SiO2)
Quartzite (River-worn Cobble)
Quartzite (composed primarily of SiO2)
Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Chert (Honey Chert or Chalcedony Pebble)
Cryptocrystalline Quartz (SiO2)
Quartz (Iron-Stained or Milky Quartz)
Silicon Dioxide (SiO2)
Quartzite (Yellow/Iron-Stained)
Quartzite (SiO2 with Iron Oxide impurities)
River Pebble (Likely Quartzite or Chert)
Quartzite (primarily SiO2)
Quartz / Quartzite
Silicon Dioxide (SiO2)
Orange Quartzite / Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
Quartz / Milky Quartz
Silicon Dioxide (SiO2)
Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)