Basalt with Epidote (Flowerstone-like texture)
Amygdaloidal Basalt (silicate mineral inclusions)
igneous
Category
Mineral (Silicate Variety)
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
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Vein-bearing metamorphic rock, likely gneiss or schist
Banded silicate rock; likely quartz–feldspar–mica gneiss with a quartz vein
metamorphic
Blue Zircon
Zirconium Silicate (ZrSiO4)
mineral
Rhodonite
Manganese Silicate (MnSiO₃)
mineral
Pink Rhodonite
Manganese Silicate (MnSiO3)
mineral
Iron Slag
Anthropogenic Ferro-silicate
mineral
Rhodonite
Manganese silicate (MnSiO3)
mineral
Garnet (almandine or pyrope variety)
Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3
mineral
Quartz (Iron-Stained or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Unidentified Dark Mineral or Rock
Indeterminate (Likely Silicon Dioxide or Carbon-based)
mineral
Glauconitic Sandstone
Glauconitic Quartz Arenite (with K,Mg,Fe,Al silicate hydroxide)
sedimentary
Glauconitic Sandstone
Glauconitic Sandstone (Greensand)
sedimentary
Glauconitic Sandstone
Glauconitic Quartz Arenite
sedimentary
Chert (specifically Green Chert/Jasper)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Tourmalinated Quartz / Tourmaline in Matrix
Silicate mineral group (Schorl / Quartz)
mineral
Unidentified brown mineral/rock fragment
Indeterminate from image; possibly iron-stained quartz, feldspar, or weathered limonite
mineral
Tree Agate
Silicon Dioxide (SiO2) with Chlorite inclusions
sedimentary
Serpentinite
Serpentinite (complex silicate mineral group (Mg,Fe)3Si2O5(OH)4)
metamorphic
Charoite
Charoite (Complex silicate mineral rock)
metamorphic
Black Jasper
Black Jasper (Silicate mineral - SiO2)
sedimentary
Jasper with Epidote
Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate (Ca2(Al,Fe)3(SiO4)3(OH))
sedimentary
Snowflake Obsidian
Vitreous volcanic silicate rock (SiO2) with Spherulite inclusions
igneous
Feldspar (specifically Orthoclase or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Unknown dark mineral fragment
Indeterminate; possibly a dark silicate mineral or slag-like geological fragment
mineral
Prase or Green Quartz
Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)
Mineral
Shale
Shale (clay-sized silicate minerals)
sedimentary
Porphyritic Igneous Rock with Iron Oxide Weathering
Weathered Porphyry (containing Quartz, Feldspar, Amphibole/Biotite, and Hematite/Limonite)
igneous
Sandstone (Glauconitic)
Glauconitic Quartz Sandstone (SiO2 + (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Potassium-Rich Silicate Clay (inferred from biological context)
Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)
mineral
Muscovite Mica
Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2
mineral
Green Sandstone
Glauconitic Sandstone
sedimentary
Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Antropogenic (Man-made industrial byproduct)
Slag Glass (Leland Blue variant)
Anthropogenic Vitreous Silicate
mineral
Black Kyanite
Aluminum Silicate (Al2SiO5)
mineral
Ocean Jasper
Orbicular Jasper / Silicate
Mineral
Zircon
Zirconium Silicate (ZrSiO₄)
mineral
Basalt with Magnetite inclusions
Basalt (Mafic silicate rock) potentially containing Magnetite (Fe3O4)
igneous
Sphalerite with Galena and Calcite / Quartz display specimens
Zinc Iron Sulfide (Zn,Fe)S with Quartz (SiO2) / Aquamarine / Fluorite
mineral
Smelter Slag
Anthropogenic Silicate Slag
igneous
Slag Glass
Vitreous Silicate Residue
industrial byproduct (anthropogenic rock)
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(BO3)3Si6O18(OH)4)
mineral