Blue Sapphire
Corundum (Al2O3)
mineral
Category
Organic Gem Material (Botanical)
Browse organic gem material (botanical) specimens identified by the Rock Identifier community.
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Brown Jasper (Likely)
Jasper (Cryptocrystalline Silicon Dioxide - SiO2)
Mineral
Amber
Succinite (Approximate formula: C10H16O)
mineral
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Rough Garnet (Almandine)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Blue Spinel on Marble with Phlogopite
MgAl2O4 (Spinel) in CaCO3 (Calcite/Marble) matrix
metamorphic
Freshwater Pearl
Aragonite / Biogenic Calcium Carbonate (CaCO3)
mineral
Amethyst (Chevron or Dream Amethyst variety)
Tectosilicate Silicon Dioxide (SiO2) with iron impurities
mineral
Jasper (Red)
Silicon Dioxide (SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Yellow Chalcedony (Carnelian/Yellow Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Mineral
Corundum (Sapphire/Ruby in Matrix)
Aluminium oxide (Al2O3)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Blue Sapphire Crystal (Rough)
Corundum (Aluminum Oxide, Al2O3)
mineral
Corundum (Ruby/Sapphire crystal)
Al2O3 (Aluminum Oxide)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Tumbled Moonstone and Amazonite Chips
Orthoclase (KAlSi3O8) and Microcline (KAlSi3O8) of the Feldspar Group
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Chrysocolla
Hydrated copper phyllosilicate, Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)
mineral
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Native Carbon (C)
mineral
Fossilized Wood (Petrified Wood)
Silicified Wood (primarily quartz/chalcedony replacing organic matter)
Sedimentary (with some aspects of mineral replacement)
Diamond
Carbon (C)
mineral
Amethyst (Tumbled Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Emerald (Beryl)
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Petrified Wood
Fossilized wood / Silicified wood
Sedimentary / Fossil
Rough Emerald/Green Beryl
Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium
mineral
Pearl (as a biogenic mineral/gemstone)
Calcium Carbonate (mostly Aragonite), CaCO3
mineral
Emerald (Tumbled Beryl)
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Amethyst
Amethyst (SiO2 - Silicon Dioxide with iron impurities)
mineral
Amethyst
Silicon Dioxide with iron impurities (SiO2)
mineral
Aquamarine
Beryl (Be₃Al₂Si₆O₁₈)
mineral
Iridescent Ammonite Fossil
Ammonoidea (subclass); Composition: Aragonite (Calcium Carbonate, CaCO3) often replaced by Calcite or Pyrite
sedimentary
Chert (Pink Chert/Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Amethyst (Chevron/Banded Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
mineral