Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
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Quartzite
Quartzite (SiO2)
metamorphic
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in a Geodic structure
mineral
Green Chalcedony (likely Chrysoprase or Green Onyx)
Silicon Dioxide (SiO2) with trace nickel or chromium inclusions
mineral
Yellow Quartzite (Iron-Stained Quartz)
Quartzite (SiO2 with Fe-oxide impurities)
metamorphic
Black Onyx (Tumbled)
Silicon Dioxide (SiO2)
mineral
Scoria
Scoria (vesicular basaltic rock)
igneous
Red Jasper (River Pebble)
Silicon Dioxide (SiO2) with hematite impurities
sedimentary (microcrystalline quartz)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Emerald in Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Druzy Quartz on Ironstone
Silicon Dioxide (SiO2) on Limonitic Ironstone
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Bloodstone
Heliotrope (Chalcedony)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Red jasper (iron-rich chert), possibly weathered hematite-rich material
Jasper: microcrystalline quartz (SiO₂) with iron-oxide inclusions; hematite: Fe₂O₃
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone
Arenite
sedimentary
Orange Quartzite
Metamorphosed Quartz-arenite (SiO2)
metamorphic
Chalcedony (Agate Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz geode
Quartz (SiO₂), likely a chalcedony-lined geode with druzy quartz
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Bronzite
(Mg,Fe)SiO3
Mineral
Black Sapphire
Corundum (Al2O3 with iron and titanium impurities)
mineral
Basalt with Quartz Veins
Basalt
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz-lined geode
Silica geode; predominantly microcrystalline quartz (SiO₂), possibly chalcedony
mineral
Amygdaloidal Basalt with Agate/Chalcedony Infills
Amygdaloidal Basalt (Composition: SiO2 and (Mg,Fe)2SiO4 in matrix; SiO2 in amygdule)
igneous
Arsenic (Native)
Arsenic (As)
mineral
Quartz Geode (Cracked)
Silicon Dioxide (SiO2)
mineral
Native Sulfur
Sulfur (S8)
mineral
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Gold Nugget
Native Gold (Au)
mineral
Grey Chalcedony (Tumbled Moon)
Microcrystalline Quartz (SiO2)
mineral
Limonite-stained Chert/Jasper
Microcrystalline Quartz (SiO2) with Iron Oxides (FeO(OH)·nH2O)
sedimentary
Geode (Unopened)
Quartz Geode (SiO2) / Chalcedony Concretion
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Geode (unopened)
Chert / Chalcedony Geode (SiO2)
sedimentary
Scoria (Lava Rock)
Mafic Volcanic Scoria
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)
Igneous
Basalt (Weathered/Tumbled)
Extrusive Mafic Igneous Rock
igneous