Basalt (with possible quartz veinsing)
Basalt
igneous
Category
Igneous And Mineral
Browse igneous and mineral specimens identified by the Rock Identifier community.
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Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Citrine Quartz
Macrocrystalline Quartz (SiO2)
mineral
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
mineral
Amethyst
Quartz (Silicon Dioxide with iron impurities), SiO2
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Milky Quartz with Garnet/Hematite and Basalt
Silicon Dioxide (SiO2) with Almandine (Fe3Al2Si3O12) and Basalt
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Rough Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Dendritic Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Basalt
Aphanitic Mafic Igneous Rock
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Pink Granite River Pebble
Phaneritic Felsic Igneous Rock (Granite)
igneous
Snowflake Obsidian (Polished Cabochon)
Obsidian with Spherulitic Cristobalite (SiO2)
igneous
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Greenschist / Serpentinite
Metamorphic rock rich in chlorite/actinolite/serpentine
metamorphic
Sand and Gravel (Quartz-rich)
Unconsolidated fluvial/beach sediment (primarily Silica/SiO2)
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
gemstone
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Matrix
Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Greasy Quartz (likely carved Milky Quartz or Aventurine)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky or Grainy Variety)
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote - {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Obsidian
Obsidian (Volcanic glass), SiO2 (major component)
igneous
Basalt
Basalt (extrusive igneous rock)
Igneous
Granite
Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)
igneous