Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
Category
Browse mineral like byproduct specimens identified by the Rock Identifier community.
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
Pegmatite (Granitic Pegmatite with Quartz, Feldspar, and Mica)
Granitic Pegmatite
Sandstone
Sandstone (SiO2 dominated)
Milky Quartz
Silicon Dioxide (SiO2)
Greenstone with Epidote or Quartz veins
Metabasalt (Greenstone facies)
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
Obsidian
Obsidian (Volcanic Glass, primarily SiO2)
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
Chrysotile Asbestos
Chrysotile (Mg3Si2O5(OH)4)
Petrified Wood
Silicified Wood (primarily SiO2)
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2) with Fe2O3
Amber
Succinate (Fossilized Tree Resin)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix
Malachite
Copper(II) carbonate hydroxide, Cu2CO3(OH)2
Quartz Geode or Druzy Quartz in Host Rock
Silicon Dioxide (SiO2)
Green Aventurine
Quartz with Fuchsite inclusions (SiO2)
Green Fluorite
Calcium Fluoride (CaF2)
Blue Apatite
Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]
Petrified Wood
Silicified Wood (SiO2)
Geode with Quartz Crystal Cavity
Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix
Geode (Unopened)
Crystalline Quartz or Chalcedony filled Geode (SiO2)
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Staurolite
Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)
Snowflake Obsidian
Hydrated Volcanic Glass (primarily SiO2) with Cristobalite inclusions
Greenschist (Chlorite Schist)
Greenschist (containing chlorite, actinolite, and epidote)
Malachite
Copper Carbonate Hydroxide (Cu2CO3(OH)2)
Sandstone with Quartz Sphere
Arenite (SiO2-rich sedimentary rock) with Quartzite/Rose Quartz sphere
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
Syenite
Syenite (Phaneritic Igneous Rock)
Granite
Granite (Felsic Plutonic Rock)
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Gneiss
Gneiss (High-grade regional metamorphic rock)
Amygdaloidal Basalt
Vesicular-Amygdaloidal Basalt (Mafic Extrusive)
Desert Rose (Baryte/Gypsum)
Barium sulfate (BaSO4) or Hydrated calcium sulfate (CaSO4·2H2O)
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
Blue Apatite
Calcium Fluorophosphate (Ca5(PO4)3F)
Obsidian
Obsidian (Volcanic Glass)
Dendritic Agate (Tumbled)
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
Caribbean Calcite
Calcium Carbonate (CaCO3) with Aragonite (CaCO3)