Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Category
Man Made Byproduct (Non Geological)
Browse man made byproduct (non geological) specimens identified by the Rock Identifier community.
Epidote (or Epidote-rich rock)
Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).
Mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Pyrite
Pyrite (FeS2)
Mineral
Prehnite with Epidote inclusions
Prehnite: Ca2Al(AlSi3O10)(OH)2; Epidote: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Serpentinite (often called Jade or Nephrite substitute)
Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)
metamorphic
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Soapstone
Steatite (primarily composed of Talc, Mg₃Si₄O₁₀(OH)₂)
Metamorphic Rock
Pearl (Imitation or Cultured)
Calcium Carbonate (Aragonite/Calcite) - CaCO3
Mineraloid (Organic)
Pink Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineraloid
Cobalt Blue Sea Glass
Amorphous Silica Glass (SiO2 + CoO)
mineraloid / anthropogenic material
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions
mineral
Chert (Chert Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Red Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Amber
Succinite (specifically Baltic Amber) - Formula: C10H16O (approximate)
Organic Mineraloid
Quartzite Pebble (Yellow/Cloudy Quartz)
Silicon Dioxide (SiO2) - Recrystallized Sandstone
metamorphic
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Quartz (Quartzite)
Silicon Dioxide (SiO2)
metamorphic
Quartzite with Iron Staining
Silicon Dioxide (SiO2) with Fe2O3 impurities
metamorphic
Quartz (Rose or Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz (Milky or Smoky Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Quartz (Citrine-colored Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Amber
Succinite (specifically for Baltic amber; fossilized tree resin)
Organic (Sedimentary-associated)
Agate
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz/Feldspar Inclusions
Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining
igneous
Banded Agate (Pink/White)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Quartz (Pink/Orange Variety)
Silicon Dioxide (SiO2)
mineral
Red Sandstone (Arkose)
Clastic Sedimentary Rock (Lithic Arkose)
sedimentary
Blue Chalcedony (likely dyed Agate)
Silicon Dioxide (SiO₂)
mineral
Wonderstone
Banded Rhyolite (SiO2 with impurities)
igneous
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral