Moonstone
Feldspar (Orthoclase with Albite), (K,Na)AlSi3O8
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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Moss Agate
Agate (Silicon Dioxide, SiO2) with dendritic inclusions
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (containing secondary minerals like Quartz, Zeolites, or Calcite)
igneous
Yellow Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Lava Rock (Scoria)
Scoria (Vesicular Basalt)
igneous
Lava Rock (Basalt)
Basalt (extrusive igneous rock)
igneous
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Flower Agate
Chalcedony (Silicon Dioxide, SiO2) with Opaque Spherulitic Inclusions
mineral
Vesicular Basalt (Scoria)
Extrusive Mafic Volcanic Rock (FeO-SiO2-MgO)
Igneous
Basalt with Vesicular Texture (Beach Cobble)
Vesicular Basalt (Aphanitic Igneous Rock)
igneous
Pumice
Vesicular volcanic glass
igneous
Basalt with Calcite Veining
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Red Jasper
Jasper (Silica/Microcrystalline Quartz with Hematite inclusions), SiO2
sedimentary
Vesicular Basalt with Mineral Inclusions
Vesicular Basalt
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (extrusive volcanic rock with mineral inclusions)
igneous
Blue Apatite
Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))
mineral
Wishing Stone (Basalt/Metabasalt with Quartz-Feldspar Vein)
Veined Metabasalt / Veined Greywacke
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Jasper (likely Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary (chemically precipitated mineral)
Jasper with Quartz Vein
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Red Jasper
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
Mineral
Dendritic Agate (specifically Orange/Tumbled)
Silicon Dioxide (SiO2) with Oxide Inclusions
mineral
Chinese Writing Stone
Porphyritic Basalt or Porphyritic Andesite with Feldspar phenocrysts (SiO2-rich Silicates)
igneous
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper (Opaque Chalcedony)
Jasper / Silicon Dioxide (SiO2) with Ferric Iron inclusions
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Volcanic Rock)
igneous
River Pebble (Greywacke / Basalt Pebble)
Indeterminate Rounded Pebble (composed of quartz, feldspar, or mafic minerals)
sedimentary
Quartzite Pebble
Quartzite (composed primarily of SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Porphyritic Andesite
Andesite (Intermediate Volcanic Rock)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Garden Pebble (Quartzite or Limestone fragment)
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) fragment
sedimentary
Pumice
Pumiceous volcanic glass
igneous
River Pebble (Graywacke/Sandstone)
Lithic Sandstone
sedimentary
Granite Water-Worn Pebble
Phaneritic Felsic Igneous Rock
igneous
Gabbro
Plagioclase-pyroxene intrusive igneous rock
igneous
Pyrite or Chalcopyrite specimen (Gold-colored mineral coating)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Orbicular jasper (likely ocean jasper)
Silica-rich microcrystalline quartz/chalcedony with feldspar and accessory minerals; composition varies
mineral
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Green aventurine quartz sphere
Quartz, SiO₂, with fuchsite or other green mica inclusions
mineral