Red jasper
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
Category
Browse mineral (specifically, a variety of the mineral species pyrope almandine garnet) specimens identified by the Rock Identifier community.
Red jasper
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
Tumbled green aventurine (probable)
Quartzite rich in quartz and fuchsite mica; SiO₂
Red-and-gray banded agate
Chalcedony (microcrystalline quartz), SiO₂, with iron-oxide coloration
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Agate Nodules
Cryptocrystalline Quartz (SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Satin Spar
Fibrous Gypsum (CaSO4·2H2O)
Rose quartz (likely)
Quartz, silicon dioxide (SiO₂), pale pink variety
Iron-stained jasper (likely rough jasper)
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides
Red jasper
Jasper, a microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
Moonstone
Orthoclase (KAlSi3O8), specifically the variety showing adularescence
Sunstone (Oregon Sunstone)
Labradorite (Feldspar variety) - (Ca, Na)(Al, Si)4O8
Amazonite
Amazonite (K[AlSi3O8])
Chert (Jasper-rich)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Tumbled red jasper (likely brecciated jasper)
Microcrystalline quartz/chalcedony, SiO₂, colored mainly by hematite and iron oxides
Red jasper (likely iron-rich chert)
Microcrystalline quartz, SiO₂, colored by iron oxides
Amethyst cabochon
Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation
Banded Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
Ocean Jasper
Orbicular Jasper/Microcrystalline Quartz (SiO2)
Unidentified tumbled amber-colored mineral
Likely microcrystalline quartz (chalcedony), possibly iron-stained feldspar or calcite
Polished/tumbled brown jasper
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions
Raw Garnet (Hessonite / Spessartine)
Silicate mineral group (X3Y2(SiO4)3)
Schist (Garnet-Mica Schist)
Garnet-Mica Schist
Polished brecciated jasper
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and possibly clay/mineral inclusions
Ruby (Raw Corundum)
Alumina (Al2O3) with Chromium traces
Amazonite
Microcline (variety of Potassium Feldspar), KAlSi3O8
Tumbled red jasper
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
Polished brecciated jasper (likely Apache tear–type iron-rich jasper)
Jasper, microcrystalline quartz (SiO₂), colored by hematite/goethite and other iron oxides
Tumbled brown jasper (probable)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions
Tumbled green aventurine
Quartzite dominated by quartz (SiO₂), with green fuchsite mica inclusions
Polished blue calcite
Calcite (CaCO₃), likely blue banded or massive calcite
Rose Quartz
Rose Quartz (SiO2)
Polished jasper (likely brecciated or orbicular jasper)
Jasper, microcrystalline quartz (SiO₂) with iron-oxide and other mineral impurities
Tumbled red-and-cream jasper
Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides
Tumbled jasper (likely brecciated or red jasper)
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions
Amethyst quartz
Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related defects
Agate (Polished Sphere)
Silicon Dioxide (SiO2)
Carved serpentine wing sculpture
Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4
Citrine or Yellow Quartz Pebble
Silicon Dioxide (SiO2)
Clear Quartz Crystal
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Silicon Dioxide (SiO2)