Bloodstone (Heliotrope)
Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite
mineral
Category
Mineral And Organic Gemstone
Browse mineral and organic gemstone specimens identified by the Rock Identifier community.
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Amethyst
Silicon Dioxide (SiO2) with iron impurities
Mineral
Beryl (Emerald or Aquamarine in Matrix)
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Aquamarine (Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Sunstone
Aventurine Feldspar (composition: (Ca,Na)((Al,Si)2Si2O8))
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Chlorastrolite (Greenstone)
Chlorastrolite (Pumpellyite variety), Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2·H2O
mineral
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Amethyst
Amethyst (Varietal of Quartz), SiO2 (Silicon Dioxide)
mineral
Amethyst (Chevron or Banded variety)
Silicon Dioxide (SiO2) with iron impurities
mineral
Sunstone
Oligoclase (a plagioclase feldspar variant), (Na,Ca)(Al,Si)4O8
mineral
Amethyst (Quartz Variety)
Amethyst (Silicon Dioxide - SiO2 with ferric iron impurities)
mineral
Amethyst
Quartz (Silicon Dioxide) with Iron impurities, SiO2
mineral
Sunstone
Orthoclase or Oligoclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Pickled Dragon Eggs (Fictional Interpretation: Purple Agate or Amethyst Geodes)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
igneous
Black Marble with Quartz Veining
Metamorphosed Limestone (Recrystallized CaCO3)
metamorphic
Chert (and Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and/or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and Flint variant)
Chert (SiO2)
sedimentary
Chert (and Petrified Wood)
Silicon Dioxide (SiO2)
sedimentary
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
mineral
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chrysocolla
Chrysocolla; (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Ocean Jasper (Orbicular Jasper)
Spherulitic Chalcedony (SiO2)
sedimentary
Mookaite Jasper
Silicified radiolarite (SiO2)
sedimentary
Epidote (Greenstone)
Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)
metamorphic
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Mookaite Jasper
Radiolarite (Chert/Jasper variety), formula SiO2
sedimentary
Lake Superior Agate
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Tiger's Eye (Unpolished)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Nuummite
Antophyllite-Gedrite Orthoamphibole (Mg,Fe)7Si8O22(OH)2
metamorphic
Granitic Pegmatite with Tourmaline
Granite (Feldspar/Quartz matrix) with Schorl (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)
igneous
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Emerald in Matrix (Quartz/Calcite)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Opal
Hydrated silica (SiO2·nH2O)
mineraloid
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral