Quartz / Rock Crystal
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Specifically A Gemstone Variety)
Browse mineral (specifically a gemstone variety) specimens identified by the Rock Identifier community.
Peridot
Olivine ((Mg,Fe)2SiO4)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper Breccia
Silicon Dioxide (SiO2) with impurities
sedimentary
Mahogany Obsidian
Obsidian (Volcanic Glass with Hematite/Magnetite inclusions), SiO2
igneous
Fluorite and Red Jasper
Fluorite (Calcium Fluoride, CaF2) and Red Jasper (Silicon Dioxide, SiO2)
mineral
Moonstone
Orthoclase (KAlSi3O8), a variety of potassium feldspar
mineral
Basalt with Amygdaloidal Inclusions
Aphanitic Mafic Volcanic Rock (Basalt)
igneous
Green Aventurine
Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)
Mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO₂)
mineral
Yellow Quartz (Citrine or Yellow Chalcedony)
Silicon Dioxide (SiO2)
mineral
Jasper
Jasper (Silica/Silicon Dioxide, SiO2)
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chevron Amethyst
Silicon Dioxide (SiO2) with trace Iron (Fe3+)
mineral
Banded Agate (likely Carnelian Agate or Sardonyx)
Agate is a common name for a microcrystalline variety of Quartz (SiO₂), specifically a form of Chalcedony.
Sedimentary Rock (technically a variety of Chalcedony)
Beach Pebble (likely Quartz or Chalcedony)
Silicon Dioxide (SiO2)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Dalmatian Stone (Dalmatian Jasper)
Dalmatian Stone (A variety of Perthite / Aplite)
Igneous
Arid Sandy Loam
Arenosols / Regosols
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
White Marble
Calcite-rich Metasomatized Carbonate (CaCO3)
metamorphic
Green Calcite
Calcite (CaCO3)
mineral
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with dendritic inclusions
mineral
Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Larimar
Pectolite (NaCa2Si3O8(OH))
mineral
Yellow Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with iron oxide (Limonite/Goethite) inclusions
sedimentary
Jasper Pebble
Tumbled Jasper (Microcrystalline Quartz, SiO2)
sedimentary
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Chert (specifically Blue Chert/Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Basalt (Greenstone)
Amygdaloidal Basalt / Chloritized Basalt
Igneous
Picture Jasper
Silicon Dioxide (SiO2)
sedimentary
Mica (likely Muscovite)
Muscovite / KAl2(AlSi3O10)(OH)2
mineral
Chert (Red Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Red Chert / Jasper)
Silicon Dioxide (SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)
Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)
Mineral for Fluorite; Mineral/Rock for Jadeite (as it's often a rock composed primarily of jadeite mineral)
Chert Pebble (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary