Heated Citrine (Heat-Treated Amethyst)
Silicon Dioxide (SiO2), quartz variety
mineral
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
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Citrine Geode
Silicon Dioxide (Quartz variety, often heat-treated amethyst): SiO2
mineral
Scoria
Extrusive igneous basaltic rock
igneous
Picture Jasper
SiO2 (Microcrystalline Quartz / Chalcedony with iron oxide impurities)
sedimentary
Granite
Intrusive igneous rock
igneous
Quartz Vein in Basalt
Silica-infilled basaltic host rock
igneous
Porphyritic Basalt or Spotted Pebble
Porphyritic volcanic rock with phenocrysts
igneous
Imperial Topaz
Aluminum Silicate Fluoride Hydroxide Al2SiO4(F,OH)2
mineral
Porphyritic Basalt
Porphyritic Aphanitic Basalt with Plagioclase Phenocrysts
igneous
Sunstone
Oligoclase (Plagioclase Feldspar), (Ca,Na)(Al,Si)4O8
mineral
Scoria (Lava Rock)
Scoria
igneous
Scoria (Lava Rock)
Mafic Vesicular Volcanic Rock
igneous
Pumice
Pumice (Vesicular Rhyolite/Dacite)
igneous
Vesicular Basalt (Scoria)
Mafic extrusive volcanic rock (predominantly Plagioclase feldspar and Pyroxene)
igneous
Vesicular Basalt (Iron-rich)
Scoriaceous Basalt
igneous
Red Jasper
Silicon dioxide (SiO2) with iron inclusions
sedimentary
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Vesicular Basalt
Vesicular Basalt
igneous
Dalmation Stone (Dalmation Jasper)
Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)
igneous
Basalt (Vesicular)
Mafic Volcanic Rock (rich in Magnesium and Iron)
Igneous
Basalt with Scoria
Mafic Volcanic Rock (Basalt/Scoria)
igneous
Granite (Pink/Red Granite)
Phaneritic Igneous Rock (primarily SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Vesticular Basalt
Vesicular Basalt
igneous
Basalt (Vesicular and Scoria)
Basalt (extrusive volcanic rock)
igneous
Pumice
Vesicular Rhyolite (highly vesicular igneous volcanic rock)
igneous
Granitic Quartz or Pegmatite
Quartz with Orthoclase Feldspar (SiO2 + KAlSi3O8)
igneous
Vesicular Basalt (Iron-Stained)
Mafic Volcanic Rock (Basalt)
igneous
Rose Quartz
Rose Quartz (Silicon Dioxide, SiO2)
mineral
Scoria (Lava Rock)
Mafic extrusive volcanic rock (Scientific formula varies based on mineral content: primarily SiO2, MgO, and FeO)
igneous
Basalt with Vesicles
Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)
igneous
Dalmatian Jasper
Peralkaline Quartz-Feldspar Igneous Rock
igneous
Vesicular Basalt (or Scoria)
Vesicular Basalt (Aphanitic-vesicular volcanic rock)
igneous
Moonstone
Orthoclase (KAlSi3O8) with inclusions of Albite (NaAlSi3O8)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Vesicular Basalt (Aqueous Tumbled)
Scoriaceous Basalt
igneous
Unakite (likely epidote–feldspar rock)
Epidote–K-feldspar–quartz aggregate; commonly approximated as pink orthoclase/microcline + green epidote + quartz
metamorphic
Quartz with Actinolite or Tourmaline inclusions
Silicon Dioxide (SiO2) with Ca2(Mg,Fe)5Si8O22(OH)2 or Tourmaline group inclusions
igneous
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Synthetic/Consumer Product
Scoria (Lava Rock)
Extrusive Igneous Scoria (Vesicular Basalt)
igneous
Jasper (Nephrite-like appearance)
Silicon Dioxide (SiO2) with impurities
sedimentary
Vesicular volcanic scoria (likely basaltic scoria)
Scoria; predominantly iron- and magnesium-rich silicate glass with plagioclase, pyroxene, and possible olivine
igneous
Scoria
Vesicular Mafic Igneous Rock
igneous