Banded Agate (specifically sardonyx or carnelian agate variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Category
Browse mineral (specifically a cryptocrystalline variety of quartz) specimens identified by the Rock Identifier community.
Banded Agate (specifically sardonyx or carnelian agate variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Banded Agate (specifically Black Sardonyx/Onyx variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Citrine Quartz carving
Silicon Dioxide (SiO2)
Jasper (specifically variegated or swamp jasper beads)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Flint (or Chert)
Silicon dioxide (Microcrystalline Quartz, $SiO_2$)
Chert (Flint)
Microcrystalline quartz (SiO2)
Jasper Conglomerate (Puddingstone)
Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)
Jasper (specifically Bloodstone or Heliotrope variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (specifically Flint)
Silicon dioxide (SiO2)
Agate (Polished Sphere)
Silicon Dioxide (SiO2)
Chert (specifically Jasper/Carnelian variety)
Microcrystalline quartz (SiO2)
Chert (Yellow Jasper varieties)
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Chert (Chert Nodule in Limestone)
Microcrystalline Quartz (SiO2)
Chert (or Microcrystalline Quartz)
Chert (Silicon Dioxide, SiO2)
Jasper (specifically Red Jasper or Iron-stained Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
Agate (specifically, likely a geode slice or nodule)
Agate (a variety of Chalcedony, with chemical formula SiO2)
Red Jasper
Silicon Dioxide (Microcrystalline Quartz) - $SiO_2$
Chert (specifically Pink/Tan Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert Pebble (Yellow/Brown Jasper variety)
Microcrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Citrine Quartz
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
Citrine
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
Banded Agate
Cryptocrystalline Quartz (SiO2)
Tumbled Quartz (Snow Quartz)
Silicon Dioxide (SiO2)
Green Aventurine
Quartz variety (SiO2) with fuchsite inclusions
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or limonite inclusions
Yellow Aventurine
Quartz (SiO2) with inclusions
Blue Quartz (or Blue Aventurine)
Silicon Dioxide (SiO2) with inclusions (typically Crocidolite or Dumortierite)
Milky Quartz
Silicon Dioxide (SiO2)
Yellow Jasper
Tectosilicates (SiO2) with Goethite/Iron oxide inclusions
Chert (Flint) Nodule
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Blue Topaz
Aluminum Silicate Fluoride Hydroxide - Al2SiO4(F,OH)2
Red Jasper with Quartz
Silicon Dioxide (SiO2) with Hematite inclusions
Banded Agate (specifically Carnelian Agate)
Silicon Dioxide (SiO2)
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)
Jasper (likely Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with impurities
Blue Chalcedony
Silicon Dioxide (SiO2)
Sapphire in a ring
Corundum (Al2O3)
Chert (specifically Yellow/Honey Jasper variety)
Cryptocrystalline Quartz (SiO2)
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)