Banded Agate (Banded Chert / Jasper)
Silicon Dioxide (SiO2)
Category
Browse mineral (variant of quartz) specimens identified by the Rock Identifier community.
Banded Agate (Banded Chert / Jasper)
Silicon Dioxide (SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Amazonite
K(AlSi3O8) - Potassium Feldspar (Microcline variant)
Yellow Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chalcedony (including Carnelian and Agate variants)
Silicon Dioxide (SiO2)
Chert (variant Flint/Novaculite)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Limestone/Flint variant)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Chert (variant Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
Labradorite
(Ca,Na)(Al,Si)4O8
Yellow Jasper (Chert variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
Chert
Microcrystalline Quartz (SiO2)
Chert (Nodule)
Chert (Alpha-Quartz, SiO2)
Riverstone Jasper (Chert variant)
Silicon Dioxide (SiO2) with impurities
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
Sandstone (Red Arkose)
Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)
Chert (Flint)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (SiO2 with impurities)
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
Chert (Jasper/Agate variant)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Greenstone Pebbles (Basalt/Diabase)
Metamorphosed Mafic Rock (Greenstone)
Porphyry (Flower Stone)
Porphyritic Basalt or Andesite
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
Chert (often called Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Granite
Granite (phaneritic intrusive igneous rock consisting of 20-60% quartz, orthoclase/plagioclase feldspar, and mica/amphibole)
Satin Spar (Selenite variant)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
Golden Sheen Obsidian
Obsidian (volcanic glass) with inclusions of gas bubbles and mineral crystals (e.g., hematite, magnetite) causing the sheen
Chert (specifically Yellow or Brown Chert / Jasper)
Silicon Dioxide (SiO2)
Likely basalt pebble
Basalt; fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene with possible olivine
Yellow Chert (Gold-toned Jasper)
Silicon Dioxide (SiO2)
Chert (Flint/Jasper variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Rough Blue Diamond
Carbon (C)
Basalt (Phaneritic or Diabase)
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
Chert (varietal: Flint/River Pebble)
Cryptocrystalline Quartz (SiO2)