Carnelian and Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite and Limonite inclusions
mineral
Category
Man Made Glass (Not A Natural Rock Or Mineral)
Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.
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Quartz (Rose Quartz / Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose)
Arenite (SiO2 principal composition)
sedimentary
Sandstone (Calcareous or Ferruginous)
Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Amethyst Quartz
Amethyst (Silicon Dioxide, SiO2)
mineral
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Mineral (Man-modified)
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Anthropogenic (Man-made)
Garnet (Almandine/Pyrope series)
Garnet Group - X3Y2(SiO4)3
mineral
Rhinestone (or glass crystal)
Silicon dioxide (if glass) / Various
Mineral/gemstone imitation
Crushed Limestone
Calcium Carbonate (CaCO3)
Sedimentary
Sandstone (Stream-rounded)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Quartzose Sandstone)
Arenite
sedimentary
Quartz (likely Herkimer Diamond style)
Silicon Dioxide (SiO2)
mineral
Chert (and Agate/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)
N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)
Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)
Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
sedimentary
Diamond (Cut and Polished)
Diamond (pure Carbon, C)
gemstone
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Weathered Sandstone
Quartz Arenite / Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Mineral
Desert Rose (Gypsum Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Diamond
Carbon (C)
gemstone
Grey Chalcedony
Silicon Dioxide (SiO2)
mineral
Sandstone Concretion
Sedimentary concretion
Sedimentary
Granite Pebble
Granite (Phaneritic Igneous Rock)
igneous
Breciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Precious Coral (Red Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
metamorphic
Sandstone (likely Quartzose type)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (SiO2 with accessory minerals)
sedimentary
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary