Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Category
Gemstone
Browse gemstone specimens identified by the Rock Identifier community.
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Red Jasper (or Agate/Jasper mixture)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Emerald in Schist (Raw/Tumbled)
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities in Mica Schist
metamorphic
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Mineral (synthetic) and Metal (precious/base)
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Black Jasper
Silicon dioxide (SiO2) with carbon/mineral inclusions
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Raw Sunstone
Plagioclase Feldspar (Na, Ca)(Al, Si)4O8
mineral
Serpentine (Healerite variety)
Serpentine group, Mg3Si2O5(OH)4
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Rhodonite, Gray Moonstone, and White Feldspar Mix
Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)
mineral
Rhodonite
Rhodonite (Manganese Silicate), chemical formula: (Mn,Fe,Mg,Ca)SiO3
Mineral
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Carnelian
Carnelian (Chalcedony / SiO2)
mineral
Unakite-veined Granite / Epidotized Granite
Epidotized Granite (FeCu2Al2(Si2O7)(SiO4)(OH)2)
igneous
Red Jasper
Jasper (Silicon Dioxide with Iron inclusions - SiO2)
Sedimentary/Metamorphic
Red Jasper
Silicon Dioxide with Iron inclusions (SiO2)
sedimentary
Chert (and/or Siltstone River Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
River Jasper (Chert/Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Tanzanite
Blue/Violet Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))
mineral
Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Montana Moss Agate
Chalcedony (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate - Mn%,Fe%,Mg,Ca)SiO₃
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Moonstone
Orthoclase (KAlSi3O8) with inclusions of Albite (NaAlSi3O8)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Sunstone
Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Peridot (Olivine)
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Moonstone
Orthoclase (Potassium aluminum silicate - KAlSi3O8)
mineral
Gray Chalcedony Gemstone
Chalcedony (SiO2)
mineral
Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral