Chert / River Pebble
Silicon Dioxide (SiO2)
sedimentary
Category
Organic Gemstone (Not A Mineral)
Browse organic gemstone (not a mineral) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Chrysocolla on Matrix
Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)
mineral
Chrysocolla on Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Amazonite
Microcline (K(AlSi3O8))
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Iron, or Manganese
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
gemstone
Quartz with Schorl inclusions
Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate Hydroxide (Black Tourmaline)
mineral
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Yellow Quartz or Citrine
Silicon Dioxide (SiO2)
mineral
Nuummite
Nuummite (mixture of Anthophyllite and Gedrite)
metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with impurities of iron)
mineral
Citrine
Silicon Dioxide (SiO2) with iron impurities
Mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Chrysocolla in Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Botryoidal Chalcedony in Geode/Vug
Silicon Dioxide (SiO2)
mineral
Amazonite
Tectosilicate (variety of Microcline), K(AlSi3O8)
mineral
Carnelian
Carnelian (SiO2)
mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst (Chevron or Banded Amethyst)
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral
Nuummite
Antophyllite-Gedrite (Orthorhombic amphiboles)
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
mineral
Moonstone
Orthoclase (Potassium aluminum silicate - KAlSi3O8)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)
mineral
Amazonite
Potassium Feldspar (KAlSi3O8) with lead impurities
mineral
Chrysocolla
Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Beryl (likely Aquamarine or Green Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Moonstone (Orthoclase Feldspar)
(K,Na)AlSi3O8
mineral
Fossil Shark Tooth
Otodus sp. (likely Otodus obliquus) fossil
fossil
Fossil Shark Tooth
Elasmobranchii (Class) fossil - possibly Odontaspididae family
fossil