Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (With Some Aspects Of Mineral Replacement)
Browse sedimentary (with some aspects of mineral replacement) specimens identified by the Rock Identifier community.
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2
metamorphic
Amber
Fossilized tree resin (not a true mineral as it is organic and amorphous); Chemical formula is highly variable, but often approximated as C10H16O.
Mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Native Carbon (C)
mineral
Diamond
Native Carbon (C)
mineral
Peridot
Olivine ((Mg,Fe)2SiO4)
mineral
Giallo Ornamental Granite
Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Granitic Pegmatite
Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)
igneous
White Jade (Nephrite)
Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2
Mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
White Topaz
Al2SiO4(F,OH)2 (Aluminium Silicate Fluoride Hydroxide)
mineral
Smoky Quartz
SiO2 (Silicon Dioxide with aluminum impurities)
mineral
Milky Quartz with Epidote or Chlorite inclusions
Silicon Dioxide (SiO2) with inclusions of Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Banded Jasper (Chert)
Silicon Dioxide (SiO2) - variety of Chalcedony
Sedimentary Rock
Obsidian
Obsidian (principally SiO2 with MgO and Fe3O4)
igneous
Granitic Pegmatite
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)
Igneous
Schist
Mica Schist (primarily consisting of muscovite KAl2(AlSi3O10)(OH)2 or biotite K(Mg,Fe)3(AlSi3O10)(OH)2)
metamorphic
Anthracite Coal
Coal (predominantly carbon)
sedimentary
Smoky Quartz
Silicon dioxide with aluminum impurities (SiO2)
mineral
Rose Quartz with Feldspar Inclusions
Silicon Dioxide (SiO2)
mineral
Red Garnet (Pyrope or Almandine)
Magnesium aluminum silicate (Mg3Al2(SiO4)3) or Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Desert Rose (Baryte/Gypsum Rosette)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
C (Carbon)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Pearl
Aragonite and Calcite (CaCO3) with Conchiolin
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sulfur (in host rock)
Native Sulfur (S8)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Clear Quartz (beads in a bracelet)
Quartz (SiO2)
Mineral
Slate
Foliated low-grade metamorphic rock
metamorphic
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Brown Jasper (Likely)
Jasper (Cryptocrystalline Silicon Dioxide - SiO2)
Mineral
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Peridot
Olivine (Mg,Fe)2SiO4
Mineral
Ruby in Zoisite
Ruby (α-Al2O3) embedded in Zoisite (Ca2Al3(SiO4)3(OH)) with some Hornblende
Metamorphic Rock (composed of multiple minerals)
Schist
Schist (various mineral compositions)
Metamorphic
Calcite
Calcite (CaCO₃)
Mineral