Satin Spar Gypsum (Satin Spar Selenite)
Hydrous calcium sulfate (CaSO4%C2%A02H2O)
mineral
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
Learn about Amorphous Solid in the encyclopedia
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Green Aventurine (or Jadeite/Nephrite Jade)
SiO2 (Silicon Dioxide) - Aventurine Quartz
gemstone
Green Quartzite
Meta-quartzite with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)
metamorphic
Dyed Agate
Chalcedony (SiO2)
mineral
Banded Calcite (often sold as 'Travertine' or 'Mexican Onyx')
Calcium Carbonate (CaCO3)
sedimentary
Dyed Howlite (often sold as 'Turquenite')
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Moonstone
Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8)
mineral
Porphyritic Basalt (River Rock)
Porphyritic Basalt
igneous
![Arfvedsonite (often mistakenly sold as Astrophyllite) (Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]) — mineral](https://media.rockidentification.com/6e8b521a-e0bc-4cec-8657-2fd2e3051a43-thumbnail.jpg)
Arfvedsonite (often mistakenly sold as Astrophyllite)
Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]
mineral
Mixed Gemstone and Mineral Collection
Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)
mineral
Honey-colored chalcedony (likely carnelian)
Microcrystalline quartz, SiO₂; orange chalcedony colored by iron oxides
mineral
Quartz (Yellow Quartz / Citrine / Calcite)
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Carved quartz skull, likely smoky quartz or gray chalcedony
Silicon dioxide (SiO₂), quartz or microcrystalline quartz
gemstone
Peacock Ore (Bornite or Chalcopyrite)
Bornite (Cu5FeS4) or Acid-Washed Chalcopyrite (CuFeS2)
mineral
Banded Calcite (often commercially called Onyx)
Calcite (Calcium Carbonate, CaCO3)
mineral
Aragonite (Banded Calcite / 'Mexican Onyx')
Aragonite (Calcium Carbonate - CaCO3)
mineral
Red Scoria (Volcanic Cinder)
Scoria (Extrusive Mafic Igneous Rock)
igneous
Rounded gray pebble, likely basalt or andesite
Fine-grained volcanic rock, probably basaltic-andesite; exact identification requires testing
igneous
Vesicular volcanic rock, likely pumice or scoria
Vesicular rhyolitic–andesitic volcanic rock; predominantly silicate glass with feldspar and possibly pyroxene
igneous
Quartz-veined Metamorphic Rock (Wishing Stone)
Quartz-veined Metamorphic/Igneous Host Rock with Quartz Veinlets
metamorphic
Granite / Pegmatite Pebble
Felsic intrusive igneous rock
igneous
Eye Agate
Chalcedony (Silicon Dioxide, SiO2)
sedimentary
Basalt Pebble with Vesicles
Vesicular Basalt
igneous
Porphyritic Rhyolite (Llanite or similar)
Porphyritic Rhyolite / Quartz-Feldspar Porphyry
igneous
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Polychrome Jasper
Silicon Dioxide (SiO2) with iron and other mineral inclusions
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide) with Chlorite or Iron/Manganese inclusions (SiO2)
mineral
Jasper with Quartz Veining
Silicon Dioxide (SiO2)
sedimentary
Vesicular Basalt
Extrusive Basaltic Scoria (CaAl2Si2O8 / (Mg,Fe)2SiO4)
igneous
Basalt with Scoria/Vesicular Texture
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Granite Pebble
Granite (Phaneritic Quartz-Feldspar Rock)
igneous
Orca Agate
Chalcedony (SiO2) with various inclusions
mineral
Lava Rock (Scoria)
Scoria (highly vesicular basaltic rock)
igneous
Pumice
Vesicular volcanic glass (primarily Alumino-silicates)
igneous
Vesicular Basalt (Lava Rock)
Aphanitic Mafic Igneous Rock
igneous
Red Jasper (Brecciated)
Silicon Dioxide with Iron inclusions (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Pumice
Pumice (Vesicular Rhyolite/Andesite)
igneous
Scoria (Lava Rock)
Vesicular Basalt / Scoria
Igneous
Vesicular Basalt
Vesicular Basalt (Aphanitic Mafic Igneous Rock)
igneous