Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
metamorphic
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
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Schist
Mica Schist
metamorphic
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
mineral (treated)
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Limonite (Iron Ore/Sandstone mixture)
Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Basalt with Quartz Veins
Basalt (SiO2 range 45-52%)
igneous
Sandstone (likely Graywacke or Arkose)
Clastic Sedimentary Rock (primarily SiO2 with various lithic fragments)
sedimentary
Granite Pebble
Granite (Felsic intrusive igneous rock)
igneous
Gneiss
Gneiss
metamorphic
Basalt with Calcite Veins
Basalt (containing CaCO3 inclusions)
igneous
Granite
Granite (Felsic Plutonic Rock)
Igneous
Granite (River-worn Pebble)
Phaneritic Igneous Rock (Granitic composition)
igneous
Aqua Aura Quartz
Titanium/Gold-coated Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with Cristobalite inclusions)
igneous
Chert (variously known as Flint or Microcrystalline Quartz)
Silicon dioxide (SiO2)
sedimentary
Copper-bearing Mica Schist
Mica Schist with Native Copper inclusions
metamorphic
Basalt with Quartz Veining
Basalt (Mafic Volcanic Rock) with Silicon Dioxide (SiO2) inclusions
igneous
Diorite
Diorite
igneous
Red Granite
Phaneritic Felsic Igneous Rock
igneous
Vesicular Basalt
Basalt (Vesicular)
igneous
Pink Marble or Rose Quartz (Likely Pink Marble based on carving texture)
Recrystallized Calcite (CaCO3)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Granite
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
igneous
Graphite
Graphite (Chemical Formula: C)
Mineral (Native Element)
Quartz / Limestone Gravel
SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)
igneous and sedimentary mixture
Quartz Veined Rock (Likely Graywacke or Quartzite)
Silicon Dioxide (SiO2) veins in Metasedimentary matrix
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Red Shale
Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)
sedimentary
Kyanite (within Quartz)
Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Siltstone Pebble
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Schist (Garnet-Mica Schist)
Garnet-Mica Schist (X-Y)3Z2(SiO4)3
metamorphic
Porphyritic Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Basalt (Extrusive Mafic Igneous)
igneous
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)
igneous
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
igneous
Ferruginous Siltstone or Mudstone
Ferruginous Siltstone / Goethitic Sandstone
sedimentary
Mica Schist
Mica Schist (Complex Silicate Rock)
metamorphic
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous