Amethyst
Amethyst (Silicon Dioxide - SiO2 with ferric impurities)
mineral
Category
Synthetic Or Natural Fiber
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Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Smoky Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Amethyst/Smoky Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Crushed Stone / Gravel
Aggregatus saxum (variable mineral composition)
sedimentary
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Dragon Vein Agate
Chalcedony (cryptocrystalline silica, SiO2) variety Agate
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Shale creek bed
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Shale
Argillite / Shale
sedimentary
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral](https://media.rockidentification.com/c8b7a91a-34a9-4307-b134-1cd8d468a8e0-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pearl
Calcium Carbonate (CaCO3)
mineral
Carnelian Agate
Silicon dioxide (SiO2) - variety of chalcedony
mineral
Gemstones (Emerald and Yellow Topaz or Citrine)
Beryl (Be3Al2Si6O18) and Quartz (SiO2) or Topaz (Al2SiO4(F,OH)2)
mineral
Red Sandstone
Arenite (predominantly SiO2 with Fe2O3 staining)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
mineral
Blue Agate (Tumbled and Dyed)
Silicon Dioxide (SiO2) with likely organic dyes
mineral
Banded Agate (specifically Botswana Agate or Water-line Agate)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Carnelian
Carnelian (Silicon Dioxide - SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz (Variety: Rose Quartz/Smoky Quartz mix)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Green Aura Quartz
Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)
mineral
Sandstone (Grooved/Weathered)
Arenite (composed primarily of Quartz and Lithic fragments)
sedimentary
Sandstone (Cross-bedded Drill Core)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Greenstone with Epidote or Quartz veins
Metabasalt (Greenstone facies)
metamorphic
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Strawberry Quartz (Red Aventurine)
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Kidney Stone
Calcium Oxalate (CaC2O4·nH2O)
mineral
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
sedimentary
Black Pearl (Tahitian or Irradiated Type)
Organic gemstone (Calcium Carbonate with Conchiolin Binding)
mineraloid
Fossiliferous Limestone (Coral Fossil)
Scleractinian Coral in Calcium Carbonate (CaCO3)
sedimentary
Picture Jasper
Silicified sedimentary or volcanic rock (primarily SiO2)
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic