Quartz
Silicon dioxide (SiO2)
Mineral
Category
Mineral (Specifically A Cryptocrystalline Variety Of Quartz)
Browse mineral (specifically a cryptocrystalline variety of quartz) specimens identified by the Rock Identifier community.
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Mineral
Buffalo Nickel (Indian Head Nickel)
Cupronickel (75% Copper, 25% Nickel)
mineral (processed alloy)
Serpentine (Serpentinite)
Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
River Jasper (Chert/Chalcedony mix)
Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions
sedimentary
Mixed Tumbled Stones (Mostly Agate, Jasper, and Quartz)
Silicon Dioxide (SiO2)
sedimentary and metamorphic minerals
Carnelian (Carnelian Agate)
Carnelian (Silicon Dioxide - SiO2)
mineral
Carnelian
Carnelian (Silicon Dioxide - SiO2)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Chert (variations include Flint or Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Ocean Jasper
Orbicular Jasper (varietal of SiO2 with impurities)
mineral
Gneiss
Gneiss
metamorphic
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Montana Moss Agate
Chalcedony (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Amethyst
SiO2 (Silicon Dioxide with Iron impurities and natural radiation influence)
mineral
Native Gold (Placer Gold)
Native Gold (Au)
mineral
Pegmatite (Granitic)
Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)
igneous
Chert (and Limestone)
Chert (consisting of Microcrystalline Quartz, SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Agate (variety of Chalcedony)
Agate (SiO2)
mineral
Pink Granite
Felsic intrusive igneous rock
igneous
Jasper
Jasper (Silicon Dioxide, SiO2 with iron inclusions)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper (Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Crazy Lace Agate
Silicon dioxide (SiO2) - a variety of banded Chalcedony (cryptocrystalline quartz)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with iron oxide Fe2O3 cement)
sedimentary
Dendritic Opal (Common Opal)
Amorphous Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions
mineral
Amygdaloidal Basalt with Epidote/Chlorite
Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))
igneous
White Quartz (Milky Quartz Mushroom)
Silicon Dioxide (SiO2)
mineral
Amazonite
Amazonite (KAlSi3O8 - Microcline)
mineral
Green Quartzite (Aventurine-like)
Quartzite (primarily SiO2 with chromium-rich mica or chlorite inclusions)
metamorphic
Blue Sapphire
Corundum (Al2O3 with trace amounts of iron and titanium)
mineral
Apricot Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Chert (specifically Red Chert/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary