Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Category
Igneous, Sedimentary, Or Metamorphic (Mineral Based)
Browse igneous, sedimentary, or metamorphic (mineral based) specimens identified by the Rock Identifier community.
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Rhodonite
Rhodonite (Manganese silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Amazonite
K(AlSi3O8)
mineral
Amethyst (Chevron or Banded Amethyst)
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral
Gneiss
Gneiss
metamorphic
Amazonite (likely mixed with other feldspars/minerals)
Amazonite is a variety of Microcline, which is a tectosilicate mineral, formula KAISi3O8. The mixed beads could include other feldspars or quartz.
Mineral
Limonite/Goethite on Shale
Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock
sedimentary
Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)
Quartz (SiO₂)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Kyanite
Kyanite (Al2SiO5)
Mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Granite (Leucogranite)
Felsic Plutonic Rock (Granite)
igneous
Fuchsite Quartzite
Fuchsite-bearing Quartzite
Metamorphic
Tree Agate (or Moss Agate), faceted into a crystal tower
Dendritic Agate (Silicon Dioxide, SiO2)
Mineral
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
sedimentary or metamorphic
Quartz
Silicon dioxide (SiO2)
Mineral
Ferruginous Sandstone (with possible Epidote/Chlorite coloring)
Sandstone (SiO2 dominated with Fe2O3 staining)
sedimentary
Seraphinite
Clinochlore (a variety of the chlorite group)
mineral
Quartz (Amethyst variety)
Silicon Dioxide (SiO2)
mineral
General Gravel (River Rock/River Stones)
Mixed Lithic Sediments (Conglomerate Clasts)
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)
Igneous
Epidote
Epidote - {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Mineral
Milky Quartz
Quartz (SiO2)
Mineral
Scoria (Lava Rock)
Mafic extrusive volcanic rock (Scientific formula varies based on mineral content: primarily SiO2, MgO, and FeO)
igneous
Magnetite
Magnetite (Fe3O4)
mineral
Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Garnet Schist
Almandine-Garnet Mica Schist
metamorphic
Chalcedony or Chert/Jasper with secondary mineral staining
SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.
Mineral, potentially a rock with chalcedony/jasper.
Schist
Mica Schist
metamorphic
Citrine or Yellow Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Vesicular Basalt with Lichen
Vesicular Basalt
igneous