Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Category
Igneous Or Sedimentary (Anthropogenic Modification)
Browse igneous or sedimentary (anthropogenic modification) specimens identified by the Rock Identifier community.
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt
Igneous
Celestite (Celestine) Geode
Strontium Sulfate (SrSO4)
mineral
Larvikite
Monzonite (intermediate intrusive igneous rock containing plagioclase, alkali feldspar, augite, and biotite)
igneous
Granite
Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Granite
Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Granite (Pink/Red variety)
Phaneritic Felsic Intrusive Igneous Rock (composed primarily of Quartz, K-Feldspar, and Plagioclase)
igneous
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Granite
Granitoid (comprised of Quartz, Feldspar, and Mica)
igneous
Gabbro
Gabbro (Mg, Fe)2Si2O6 / (Ca, Na)(Al, Si)4O8
igneous
Pink Granite
Potassium Feldspar-Rich Granite
igneous
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Vesicular Basalt (Scoria)
Vesicular Basalt
igneous
Basalt River Pebble
Basalt (Mafic volcanic rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Granite (with mafic xenolith)
Phaneritic Felsic Plutonic Rock
Igneous
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Scoria (Lava Rock)
Scoria
igneous
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)
igneous
Diorite (River Pebble)
Phaneritic Intermediate Plutonic Rock (Diorite)
igneous
Granite
Phaneritic plutonic felsic rock
igneous
Amygdaloidal Basalt with Epidote
Vesicular Basalt with secondary Epidote/Quartz mineral infill
igneous
Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Vesicular Basalt (Pumice-like)
Vesicular Basalt
igneous
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Silver Sheen Obsidian
Volcanic Glass (Amorphous Silicon Dioxide - SiO2 with impurities)
igneous
Flowerstone
Porphyritic Basalt or Porphyritic Andesite
igneous
Granodiorite
Granodiorite (containing Plagioclase, Quartz, and Biotite)
igneous
Snowflake Obsidian
Volcanic Glass with Spherulitic Cristobalite (SiO2)
igneous
Basalt (River Pebble)
Basalt
igneous
Rhyolite
Rhyolite (felsic volcanic rock)
igneous
Basalt
Basalt (comprising plagioclase, pyroxene, and olivine)
igneous
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
igneous
Amygdaloidal Basalt with Secondary Minerals
Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)
igneous
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions
igneous
Pink Granite (Fragment)
Pink Granite (dominated by Potassium Feldspar: KAlSi3O8)
Igneous
Granite
Phaneritic Plutonic Rock (Granite)
igneous
Mahogany Obsidian
Volcanic Glass (with inclusions of Magnetite or Hematite)
igneous
Basalt
Basalt
igneous
Obsidian (worked into an arrowhead profile)
Obsidian (volcanic glass), primarily SiO2 (Silicon Dioxide)
igneous