Carnelian
Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)
Category
Browse mineral (specifically a cryptocrystalline variety of quartz) specimens identified by the Rock Identifier community.
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)
Chert (specifically Flint or Gray Chert)
Silicon Dioxide (Microcrystalline Quartz), SiO2
Chert Nodule
Chert (Cryptocrystalline variety of Quartz, SiO2)
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
Chert (Pebble)
Microcrystalline to Cryptocrystalline Quartz (SiO2)
Chert (River Cobble)
Chert (Cryptocrystalline Quartz, SiO2)
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Buffalo Nickel (Indian Head Nickel)
Cupronickel (75% Copper, 25% Nickel)
Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)
Quartz (SiO₂)
Quartz (specifically Clear or Rose Quartz)
Silicon Dioxide (SiO2)
Imperial Topaz
Al2SiO4(F,OH)2 (Fluorine-bearing Aluminum Silicate)
Tumbled carnelian
Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)
Quartz Geode
Silicon Dioxide (SiO2)
Graphic Granite
Pegmatite (Quartz and Alkali Feldspar intergrowth)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Banded Agate (Geode Fragment)
Silicon Dioxide (SiO2) - Variety Agate
Citrine
Citrine (Silicon Dioxide, SiO2)
Selenite
Gypsum (CaSO4·2H2O), specifically the crystalline variety Selenite
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Tourmalinated Quartz
Silicon Dioxide (SiO2) with Schorl inclusions (NaFe2+3Al6(BO3)3Si6O18(OH)4)
Chert (Sedimentary Rock)
Silicon Dioxide (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Agate
Silicon Dioxide (SiO2) - variety Chalcedony
Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
Chert with Quartz Vein
Silicon dioxide (SiO2)
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
Green Aventurine
Quartz (Aventurine variety) - SiO₂ with Fuchsite inclusions
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Jasper (specifically Yellow or Bumblebee-like Jasper)
Silicon Dioxide (SiO2) with impurities
Apricot Agate
Silicon Dioxide (SiO2) - Chalcedony variety
Pink Granite
Phaneritic Plutonic Felsic Igneous Rock (Granite)
Chert (Jasper or Flint variant)
Chert (composed of microcrystalline quartz, SiO2)
Chert (Flint)
Microcrystalline quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)