Quartz Geode
Silicon Dioxide (SiO2)
Category
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
Quartz Geode
Silicon Dioxide (SiO2)
Jasper (specifically Bloodstone/Heliotrope or Dark Green Jasper)
Cryptocrystalline Quartz (SiO2) with inclusions
Quartz Geode
Silicon Dioxide (SiO2)
Ferruginous Quartz (Carnelian/Sardine Jasper)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
White Opal
Hydrated Silica (SiO2·nH2O)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Quartz / Common Opal
Silicon Dioxide (SiO2)
Almandine Garnet in Schist
Almandine, Fe3Al2(SiO4)3
Mica-rich Schist fragment
Mica Schist
Mica Schist with Quartz
Mica-Quartz Schist (Muscovite subclass)
Slate
Slate (foliated metamorphic rock)
Yellow Jasper
Jasper (Silica-rich Microcrystalline Quartz, SiO2 with Iron impurities)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Common Opal
Hydrated amorphous form of silica (SiO2·nH2O)
Jasper
Silicon dioxide (SiO2)
Kyanite
Kyanite (Al2SiO5)
Garnet Schist
Almandine Garnet in Mica Schist
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Phyllite
Phyllite
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
White Marble
Recrystallized Calcite (CaCO3)
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Mica Schist (Garnetiferous)
Garnet-Mica Schist
Marble
Recrystallized Calcite / Dolomite (CaCO3)
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
Gneiss
Gneiss
Marble
Metamorphosed Limestone (CaCO3)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
Muscovite Schist
Mica Schist (primarily KAl2(AlSi3O10)(OH)2)
Yellow Aventurine (or Citrine-colored Quartz)
Silicon Dioxide (SiO2) with inclusions
Gneiss (Banded Gneiss)
Gneiss
Gneiss
Gneiss (High-grade Metamorphic Rock)
Garnet Schist
Almandine-Garnet Schist
Kyanite (Blue or Blue-Grey)
Kyanite (Al2SiO5)
Gneiss (Metamorphic Pebble)
Gneissic Metamorphic Rock
Gneiss
Gneissic Metamorphic Rock
Gneiss
High-grade Metamorphic Gneiss