Diamond
Carbon (C), specifically in an isometric crystal system.
Category
Browse anthropogenic (man made product subject to geological processes) specimens identified by the Rock Identifier community.
Diamond
Carbon (C), specifically in an isometric crystal system.
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)₈[(S,Cl,SO₄,OH)₂|(Al₆Si₆O₂₄)], with varying amounts of Calcite, Pyrite, and Sodalite.)
Rose Quartz
Quartz (SiO2) with trace elements of titanium, iron, or manganese
Peridot
Olivine (Mg,Fe)2SiO4
Shale
Shale (fine-grained clastic sedimentary rock)
Corundum
Corundum (Al2O3)
Quartzite
Quartzite (SiO2)
Serpentine
Serpentinite (rock), Serpentine group minerals (e.g., Antigorite, Lizardite, Chrysotile)
Smoky Quartz
SiO2 (Silicon Dioxide)
Crystal Quartz Beads (likely Clear Quartz)
Quartz (SiO₂)
Jasper (yellow/cream variety)
SiO₂ (Cryptocrystalline Quartz)
Quartz (vein quartz)
SiO2 (Silicon Dioxide)
Pink Stained Rock (Likely Quartzite or Sandstone with Iron Oxide Staining)
Quartzite (metamorphic) or Sandstone (sedimentary); coloration likely due to hematite or other iron oxides.
Garnet (likely Almandine, Pyrope, or a blend)
Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)
Granite
Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Himalayan Salt
Halite (mineral name), chemical formula NaCl (sodium chloride). Generally, 'Himalayan Salt' is a trade name for evaporite minerals from specific regions.
Granite
Granite (felsic intrusive igneous rock)
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Banded Gneiss
Gneiss (variable mineral composition)
Amethyst
Quartz (SiO2) with trace iron impurities
Amethyst
SiO2 (Silicon Dioxide) - a variety of Quartz
Diopside (likely Chromian Diopside)
Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.
Rose Quartz
Rose Quartz (SiO₂)
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Turquoise (beads)
Turquoise; CuAl6(PO4)4(OH)8·4H2O
Serpentinite
Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)
Jade
There are two distinct minerals classified as Jade: Jadeite (Na(Al,Fe3+)Si2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the image showing translucent, somewhat fibrous material, it is likely Nephrite.
Rose Quartz
Quartz (SiO2) with trace impurities causing pink color
Quartz
Silicon Dioxide (SiO2)
Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Peridot (Olivine)
Olivine, (Mg,Fe)2SiO4
Orange Calcite
Calcite (CaCO3)
Quartz
Quartz (SiO₂)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Bismuth
Bismuth (Bi)
Ruby
Corundum (Al₂O₃) with Chromium (Cr)
Diamond (Rough)
Diamond (C)
Chert (Flint)
Chert (microcrystalline quartz)
Serpentine
Serpentine Group Minerals (e.g., Antigorite, Chrysotile, Lizardite)