Chalcedony (Botryoidal/Tumbled Agate)
Silicon Dioxide (SiO2)
mineral
Category
Organic Material (Likely A Fruit Or Berry)
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
Fossiliferous Limestone with Crinoid stems
Calcite-rich Biogenic Sedimentary Rock (CaCO3)
sedimentary
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Fossiliferous Limestone
Calcite (CaCO3) Rich Bio-sedimentary Rock
sedimentary
Orthoclase Feldspar (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (Microcline)
mineral
Calcite
Calcite (CaCO3)
mineral
Porphyritic Basalt or Andesite
Porphyritic Basalt / Andesite
Igneous
Quartz / Common Opal
Silicon Dioxide (SiO2)
mineral
Red Jasper (Amygdaloidal Basalt with Agate)
Silicon dioxide (SiO2) in Basalt host
igneous
Baroque Pearl
Biogenic Calcium Carbonate (Aragonite/Conchiolin)
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Hematite inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Quartzite (or Iron-Stained Quartz Pebble)
Silicon Dioxide (SiO2) with Ferric Oxide inclusions
metamorphic
Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Citrine-tinted)
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Amber
Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O
mineraloid
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Shungite
Non-crystalline carbon (Fullerenes)
metamorphic
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (Lithic Wacke)
sedimentary
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Granite
Phaneritic plutonic rock (SiO2 range 65-75%)
igneous
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Blue Chalcedony (likely dyed)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Freshwater Pearl
Aragonite / Biogenic Calcium Carbonate (CaCO3)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Quartz-rich)
Sandstone (SiO2 dominated)
sedimentary
Orange Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Quartzite Cobble
Quartzite (primarily SiO2)
metamorphic
Granite
Phaneritic plutonic rock (SiO2 range 70-75%)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Sandstone (Greywacke)
Arenite / Wacke (Mainly SiO2 with various lithic fragments)
sedimentary
Sandstone (Fossiliferous)
Arenite / Clastic Sedimentary Rock
sedimentary