Chert
Microcrystalline Quartz (SiO2)
sedimentary
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
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Yellow Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2), Microcrystalline Quartz
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Rose Quartz
Silicon dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions (Hematite/Goethite)
mineral
Chrysocolla on Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Red Jasper
Silicon Dioxide (Microcrystalline Quartz), SiO2
mineral
Chert (Jasper)
Silicon dioxide (SiO2)
sedimentary
Quartz Geode (Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper-like Silicate)
Microcrystalline quartz (SiO2)
sedimentary
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Mineral in Igneous/Sedimentary host
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Vein in River Siltstone
Crystalline Quartz (SiO2) in Siliclastic Matrix
sedimentary
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite
mineral
Chert (variously known as Flint or Microcrystalline Quartz)
Silicon dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Greenstone / River Jadeite pebble
Metavolcanic rock / Chlorite or Actinolite-rich schist
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt with Secondary Mineral Amygdules
igneous
Serpentinite (likely serpentinized ultramafic rock)
Serpentine-group minerals, chiefly antigorite/lizardite; commonly derived from peridotite
metamorphic
Smoky Quartz (Tumbled/Water-worn Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Agate Jasper
Cryptocrystalline Quartz (SiO2) with impurities
mineral
Tumbled Yellow Chalcedony / Iron-Stained Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate
Agate (Cryptocrystalline variety of Silica, SiO2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
mineral
Red Sandstone (with possible iron oxide staining)
Sandstone (primarily Quartz with Hematite/Goethite cement)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Agate (Geode nodule fragment)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Polished tree agate (likely)
Chalcedony (microcrystalline SiO₂) with green dendritic/inclusion minerals
mineral
Tumbled milky quartz pebble
Quartz (SiO₂), likely milky quartz
mineral
Smoky Quartz occurring with Feldspar
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)
mineral
Quartzite
Silicon Dioxide (SiO2)
metamorphic
Lepidolite (Lithium Mica)
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Quartz with Hematite Inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
mineral