Caribbean Calcite
Calcium Carbonate with Argonite (CaCO3)
Category
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
Caribbean Calcite
Calcium Carbonate with Argonite (CaCO3)
Herkimer Diamond
Quartz (Silica - SiO2)
Sandstone
Arenite (Clastic Sedimentary Rock)
River cobble (Greywacke/Sandstone)
Sandstone / Greywacke
Pitted Sedimentary Rock / Cupstone
Sedimentary rock with weathering pit (arenite / sandstone)
Gneiss
High-grade Metamorphic Gneiss
Dalmatian Stone (Dalmation Jasper)
Aplite with Arfvedsonite inclusions
Polished brecciated jasper
Brecciated jasper, an opaque microcrystalline quartz variety (SiO₂) with iron-oxide and other mineral fragments
Geode (Unopened)
Crystalline Quartz or Chalcedony filled Geode (SiO2)
Sandstone Pebble
Arenite (Clastic Sedimentary Rock)
Sandstone
Arenite (primarily SiO2 with various cementing agents)
Sandstone (Arkose/Quartzose)
Arenite (SiO2 based clastic rock)
Garnet-bearing gneiss
Quartz–feldspar–mica gneiss with iron-rich garnet (commonly almandine)
Green Moss Agate
Silicon Dioxide (SiO2) with Mineral Inclusions
River Cobble (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneissic/Schistose)
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
Sandstone
Arenite (SiO2 based)
Clear Quartz
Silicon Dioxide (SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 based)
Ruby in Kyanite
Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Sandstone (Arenite)
Sandstone
Arenite (SiO2 primarily)
River Rock (Mossy)
Stream-rounded Clast (likely Siltstone or Sandstone with bryophytes)
Dalmation Stone (Dalmation Jasper)
Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)
Sandstone with Iron Oxide Staining
Arenite with Limonite/Hematite alteration
Sandstone
Arenite
Sandstone
Quartz Arenite / Sedimentary Rock
Jasper (Green Jasper/Heliotrope variety)
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 principal)
Sandstone (with Chert/Quartzite nodules)
Clastic sedimentary rock (primarily SiO2)
Sandstone (Iron-stained)
Arenite (primarily Quartz, SiO2)
Sandstone
Arenite (SiO2 primarily)
Tumbled red jasper
Jasper, microcrystalline quartz (SiO₂), commonly colored by iron oxides
Sandstone
Arenite (SiO2 predominantly)
Sandstone
Arenite (SiO2 based)
Green Aventurine
Silicon Dioxide (SiO2) with Chromium-bearing Fuchsite
Sandstone (likely Graywacke or Arkose)
Arenite
Sandstone
Arenite (primarily SiO2)
Red Jasper
SiO2 (Silicon Dioxide with Hematite inclusions)
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)