Amethyst
Silicon Dioxide (SiO2) with trace Iron (Fe3+)
mineral
Category
None
Browse none specimens identified by the Rock Identifier community.
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (specifically Jasper/Flint pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Yellow Chert or Jasper
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Hematite
Hematite (Fe2O3)
mineral
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Fe2O3 cement)
sedimentary
Chert (Smoky variety)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Crackle Quartz (Dyed Quarzite)
Silicon Dioxide (SiO2) with artificial dye
Metamorphic (modified)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Carnelian
Chalcedony (SiO2) with iron oxide impurities
mineral
Green Aventurine
Quartz with Fuchsine inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Ferruginous Quartz (Iron-stained Quartzite)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary
Banded Agate
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide (Fe2O3) inclusions
sedimentary
Banded Chert (with Quartz Vein)
Microcrystalline Silica (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Amethyst and Citrine (Ametrine Mix)
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Jasper Agate (specifically Brecciated Jasper)
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Jasper with Quartz Vein
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Jasper (Iron-stained Chalcedony)
SiO2 with Fe2O3 (Iron Oxide) impurities
Sedimentary / Mineral (Silica)
Quartzite
Quartzite (SiO2)
metamorphic
Yellow Aventurine
Quartz (Silicon Dioxide) with Mica inclusions (SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Jasper and Quartz conglomerate (River Rock)
Silicon Dioxide (SiO2) - Chalcedony and Quartz variety
sedimentary
Red Jasper
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
sedimentary/mineral
Chert (variations include Flint)
Chert (SiO2)
sedimentary
Chert (varietal: Jasper or Ironstone nodule)
Microcrystalline Quartz (SiO2) with iron oxides
sedimentary
Lavender Agate / Chalcedony Sphere
Agate (Microcrystalline Quartz) - SiO2
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Chert / Flint
Silicon dioxide (SiO2)
sedimentary
Iron-stained Quartzite
Metamorphic Quartz (SiO2) with limonite/hematite staining
metamorphic
Milky Quartz with Chlorite/Mica inclusions
Silicon Dioxide (SiO2) with inclusions
mineral
Golden Healer Quartz
Silicon Dioxide (SiO2) with Ferruginous (Iron Oxide) inclusions
mineral