Smoky Quartz in Matrix
Silicon dioxide (SiO2) within Pegmatite/Gneiss
igneous
Category
Synthetic Or Natural Fiber
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Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Yellow Quartz (Chalcedony/Citrine Pebble)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Natural White Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin - CaCO3
mineraloid
Diamond (as set in a gold ring)
Carbon (C)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Amber (and Citrine Quartz)
Succinite (Amber) and Silicon Dioxide (SiO2)
Organic Mineraloid and Mineral
Granite
Granite (phaneritic intrusive felsic igneous rock)
igneous
Basalt (River Pebble)
Mafic volcanic rock (primarily Plagioclase feldspar and Pyroxene)
igneous
Chert (Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Diamond (Cut Specimen)
Carbon (C)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Turquoise
Hydrate phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Blue Quartzite (Dyed)
Metamorphosed Quartz-rich Sandstone (SiO2 with organic dye)
metamorphic
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Quartz or Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Crinoid Marble (Fossilized Limestone)
Crinoidal Limestone (comprising Calcite/Aragonite CaCO3)
sedimentary
Citrine (Heat-treated Amethyst)
Citrine Quartz (SiO2)
Mineral (Tectosilicate)
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Dyed Tumbled Quartz
Silicon Dioxide (SiO2) with artificial pigment
mineral
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Mahogany Obsidian
Volcanic Glass with Hematite inclusions (SiO2)
igneous
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Green Aventurine
Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Blue Sapphire (faceted in jewelry)
Corundum (Al2O3)
mineral
Cubic Zirconia
Cubic Zirconia (Zirconium Dioxide, ZrO2)
mineral
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
metamorphic
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Blue and White Quartz
Crystalline Silicon Dioxide with inclusions (SiO2)
mineral
Black Onyx
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Smoky Quartz Geode
Silicon Dioxide (SiO2)
mineral
Coquina
Biogenic Limestone (Calcite, CaCO3)
sedimentary
Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral