Veined Basalt River Stone
Basalt with Calcite or Quartz veining
Category
Browse mineral side rock specimens identified by the Rock Identifier community.
Veined Basalt River Stone
Basalt with Calcite or Quartz veining
Quartz Geode
Silicon Dioxide (SiO2) - Crystalline Quartz
Red Sandstone
Arenite (primarily SiO2 with hematite/iron oxide coating)
Red Sandstone (Iron-stained)
Clastic sedimentary rock (primarily Quartz with Iron Oxides)
Basalt with Quartz/Calcite vein
Basalt (Mafic Igneous Rock)
Chert
Silicon dioxide (SiO2)
Geode (Unopened)
Siliceous Concretion / Geode
Gneiss with Quartz Vein
Gneiss containing Quartz (SiO2) filler
Sandstone
Clastic Sedimentary Rock (primarily Quartz, SiO2)
Sandstone (Pebble)
Arenite / Clastic Sedimentary Rock
Banded Gneiss
Gneiss (High-grade metamorphic rock)
Quartz Geode
Silicon Dioxide (SiO2)
Quartz Geode (Cracked Open Fragment)
Silicon Dioxide (SiO2)
Feldspar
Potassium Feldspar (KAlSi3O8)
Granite
Granite (a felsic intrusive igneous rock)
Red Sandstone
Arenite (primarily composed of SiO2 with Fe2O3 cement)
Sandstone (likely Quartzose type)
Clastic sedimentary rock (primarily SiO2)
Amygdaloidal Basalt
Amygdaloidal Basalt containing Zeolite or Quartz (SiO2/Silicates)
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
Granite
Phaneritic Igneous Rock (Granite)
Mexican Crazy Lace Agate
Silicon Dioxide (SiO2) with iron and aluminum inclusions
Quartz Geode (Unbroken)
Silicon Dioxide (SiO2)
Gneiss
Gneissic Metamorphic Rock
Quartz Geode
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Diamond Drill Core (Greenschist and Quartzite)
Chlorite Schist / Meta-quartzite (Metamorphic Rock Core Sample)
Jasper in Basalt Matrix
Silicon Dioxide (SiO2) with impurities; Chalcedony
Petrified Wood
Silicified Wood (SiO2)
Sandstone (Ferruginous)
Arenite (SiO2 with Iron Oxide impurities)
Sandstone (with carbonaceous plant fragments)
Arenite (composed primarily of SiO2)
Vesicular Basalt with Secondary Mineral Infill
Mafic Volcanic Rock (Basalt)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
Sandstone River Cobble
Arenite (predominantly SiO2)
Blue Chalcedony
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (composed primarily of SiO2, or Silicon Dioxide)
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Granite
Phaneritic Intrusive Igneous Rock (Granite)
Dragon Blood Jasper
Epidote with Pietersite or Red Jasper (Ca2Al2Fe3+[Si2O7][SiO4]O(OH))
Quartz Geode
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)
Anhydrite (Calcium Sulfate, CaSO4)
Sandstone
Clastic sedimentary rock (primarily SiO2)