Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Category
Metamorphic Rock (Formed From A Fibrous Crocidolite Asbestos)
Browse metamorphic rock (formed from a fibrous crocidolite asbestos) specimens identified by the Rock Identifier community.
Rose Quartz
Quartz (SiO2) with trace impurities causing pink color
Mineral
Granite
Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)
igneous
Gold Ore in Matrix
Native Gold (Au) in Quartz/Limonite host rock
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Basalt
Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)
Igneous
Aragonite
Aragonite (CaCO3)
mineral
Quartz (likely)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Orange Calcite (likely polished specimen)
Calcite
Mineral
Greenschist (Greenstone)
Chlorite schist (primarily Chlorite-Epidote-Actinolite-Albite)
metamorphic
Agate Geode
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Greywacke or Lithic Sandstone)
Arenite / Wacke
sedimentary
Amethyst
SiO2 (Silicon Dioxide) - a variety of Quartz
Mineral
Sandstone (Painted)
Arenite (primarily SiO2)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
River Pebble (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) mixture with varied clastic minerals
sedimentary/metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Epidote (or Epidote-rich rock)
Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).
Mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Granodiorite
Granodiorite
igneous
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Greenschist / Migmatite
Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)
metamorphic
Zoisite with Ruby
Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)
metamorphic
Magnetite
Magnetite (Fe3O4)
Mineral
Quartz (likely) or a Quartzite Pebble
Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.
Mineral, specifically a detrital grain
Larimar
Pectolite (a variety of pectolite, NaCa2Si3O8(OH))
Mineral
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Quartz (chalcedony variety) or Limestone with Quartz Veins
SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)
Mineral or Sedimentary Rock (with mineral inclusions)
Sandstone
Arenite (SiO2 dominant)
sedimentary
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Gneiss (Stream-worn Cobble)
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)
metamorphic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral, often found as detrital grains in sedimentary rocks
Granitoid (Granite/Gneiss)
Granitoid silicate rock, primarily quartz and feldspar
igneous/metamorphic
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite inclusions)
mineral
Orthoclase Feldspar (or K-Feldspar)
Orthoclase (KAlSi3O8)
Mineral
Basalt with Quartz/Quartzite Veins
Aphanitic Mafic Volcanic Rock with Siliceous Infillings
igneous
Greenschist
Greenschist (Major minerals include Chlorite, Actinolite, and Epidote)
metamorphic
Granite
Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)
igneous
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous