Green Opal
Hydrated Silica (SiO2·nH2O)
Category
Browse metamorphic rock (variety of quartz) specimens identified by the Rock Identifier community.
Green Opal
Hydrated Silica (SiO2·nH2O)
Quartzite pebble
Quartzite (principally SiO2)
Quartzite
Quartzite (SiO2)
Chert (Jasper/Agate variety)
Cryptocrystalline Quartz (SiO2)
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Quartzite River Rock
Quartzite (Silicon Dioxide, SiO2)
Quartzite River Rock
Quartzite (SiO2)
Iron-stained Quartzite
Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)
Quartzite
Quartzite (primarily SiO2)
Greenschist with Quartz Veining
Greenschist (commonly containing Chlorite, Actinolite, and Epidote)
Blue Calcite
Calcium Carbonate (CaCO3)
Jasper (specifically Red or Brecciated Jasper variant)
Jasper (Microcrystalline Quartz - SiO2)
Quartzite (Iron-stained)
Quartzite (SiO2)
Quartzite River Stone
Quartzite (SiO2)
Marble
Metamorphosed Limestone (calcite formulation CaCO3)
Quartzite Pebble
Quartzite (SiO2)
Chert
Chert (variant of microcrystalline quartz)
Milky Quartz
Silicon Dioxide (SiO2)
Quartzite (River Stone)
Quartzite (SiO2)
Chrysocolla on Matrix
Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)
Glacial Quartzite Cobble
Meta-orthoquartzite (SiO2)
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock
Gneiss
Gneiss (High-grade metamorphic rock)
Quartzite Beach Pebble
Metamorphosed Quartz Sandstone (SiO2)
Inspirational River Stone (Quartzite)
Metamorphosed Quartz-rich Rock (Quartzite) with SiO2 composition
Yellow Aventurine
Silicon Dioxide (SiO2) with inclusion of Mica
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartzite River Rock
Quartzite (SiO2)
Quartz
Silicon dioxide (SiO₂)
Quartzite pebble
Quartzite (primarily SiO2)
Quartz (Milky/Cloudy Variety)
Silicon Dioxide (SiO2)
Unakite
Unakite (Epidotized Granite)
Serpentine
Antigorite / Lizardite / Chrysotile mix; (Mg, Fe)3Si2O5(OH)4
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Quartzite
Quartzite (primarily SiO2)
Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
Mica Schist with Quartz
Mica Schist (primarily Muscovite or Biotite sheet silicates)
Rutilated Quartz
SiO2 (Quartz) with TiO2 (Rutile inclusions)
Quartzite pebble
Quartzite (SiO2)
Agate
Silicon dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)