Zebra Jasper
Silicon Dioxide (SiO2) with impurities; typically a form of Chalcedony/Microcrystalline Quartz
sedimentary
Category
Mineral (Variety Of Quartz)
Browse mineral (variety of quartz) specimens identified by the Rock Identifier community.
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Green Kyanite
Kyanite (Al2SiO5)
mineral
Chert with Quartz Vein
Silicon dioxide (SiO2)
sedimentary
Jasper (with Manganese or Iron inclusions)
Silicon Dioxide (SiO2)
sedimentary
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Mineral
Quartz Geode (partially formed/chalcedony with iron staining)
Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides
Mineral/Sedimentary Rock Feature
Obsidian
Volcanic Glass (70% or more SiO2)
igneous
Chert (Nodular)
Chert (SiO2 - Microcrystalline Quartz)
sedimentary
Amygdaloidal Rhyolite
Amygdaloidal Rhyolite (Felsic volcanic rock)
igneous
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Agate (specifically Carnelian Agate or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Beryl (likely Pink/Morganite variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Chert (Jasper/Agate variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Vesicular Basalt (River Pebble)
Vesicular Basalt
igneous
Banded Agate
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz with Limonite inclusions
sedimentary
Marble
Metamorphosed Limestone (calcite formulation CaCO3)
metamorphic
Peridot and Citrine Gemstones (in a ring setting)
Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Banded Agate (Onyx type)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Banded Jasper (possibly "Picture Jasper")
Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)
Sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate)
Blue Chalcedony and Picture Jasper Beads
Blue Chalcedony (SiO2), Picture Jasper (SiO2)
Mineral
Chert (Cherty Limestone / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Feldspar (specifically Orthoclase)
Potassium aluminum silicate (KAlSi3O8)
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Quartz (SiO₂)
Mineral
Jasper with Hematite (Red Jasper)
Silicon Dioxide with Iron Oxide (SiO2 and Fe2O3)
sedimentary (physico-chemical precipitate)
Pink Dyed Agate (Banded Chalcedony)
Silicon dioxide (SiO2) - variety Chalcedony
mineral
Chalcedony (Agate/Chert)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Chert (Septarian or Nodular variety)
Microcrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Rose Quartz (SiO2)
Mineral
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
sedimentary
Blue Sapphire
Corundum (Al2O3)
mineral