Smoky Quartz
Silicon Dioxide (SiO2)
Category
Browse metamorphic, likely sedimentary with quartz veins specimens identified by the Rock Identifier community.
Smoky Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Rose Quartz (SiO2)
Beryl (Emerald Variety)
Beryllium Aluminum Silicate (Be3Al2(SiO3)6)
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
Red Jasper
Silicon Dioxide (SiO₂)
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Fuchsite Schist
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist
Druzy Quartz on Matrix (likely Limestone or Sandstone)
Silicon Dioxide (SiO2) with various trace impurities
Garnet (likely Almandine or a blend)
Garnet group: X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+. Given the dark, somewhat reddish-brown appearance in the image, it's likely Almandine (Fe3Al2(SiO4)3) or a mix with other iron-rich garnets.
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
Ruby in Kyanite
Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)
Granitic Gneiss
Gneiss (High-grade regional metamorphic rock)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss
Smoky Quartz (Tumbled)
Smoky Quartz (SiO2 - Silicon Dioxide)
Amethyst (Faceted)
Silicon Dioxide with Iron impurities (SiO2)
Chert (with Quartz vein/coating)
Microcrystalline Quartz (SiO2)
Jasper with Quartz Veining
Silicon Dioxide (SiO2) with iron oxide inclusions
Wishing Stone (Quartz-veined Siltstone or Graywacke)
Hydrothermal Quartz vein in matrix of SiO2 (Quartz) and Al2O3 (Clay minerals)
Rhodonite with Manganese Oxides
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Slate
Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)
Milky Quartz
Silicon Dioxide (SiO2)
Tiger's Eye (likely variant or dark tumble)
Pseudomorph of Quartz after Crocidolite (SiO2)
Conglomerate
Clastic sedimentary rock (Conglomerate)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Wishing Stone (Gneiss or Basalt with Quartz Vein)
Gneiss or Metabasalt (with a Quartz or Calcite intrusion)
Quartzite
Quartzite (SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock
Chalcedony (Agate/Quartz variety)
Cryptocrystalline Quartz (SiO2)
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
Banded Chert with Quartz Veining
Microcrystalline Quartz (SiO2)
River Quartzite / Tumble-Polished Quartz
Quartzite (SiO2)
Gneiss
Gneiss
Arsenopyrite with Quartz
Arsenopyrite (FeAsS)
Quartz Pebble
Silicon Dioxide (SiO2)
Red Jasper
Silicon dioxide (SiO2) with iron inclusions
Gold
Native Gold (Au)
Gneiss
Gneiss