Clear Quartz Sphere
Silicon Dioxide (SiO2)
mineral
Category
Granite
Browse granite specimens identified by the Rock Identifier community.
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Yellow Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Collection of Minerals and Ores
Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Basalt River Pebble
Basalt
igneous
Erythrite
Erythrite (Cobalt Bloom) - Co3(AsO4)2·8H2O
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Gold
Native Gold (Au)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Mafic Extrusive)
igneous
Peridotite (Dunite)
Peridotite (mostly Olivine: (Mg,Fe)2SiO4)
igneous
Chert (Gravel Bit)
Microcrystalline silica (SiO2)
sedimentary
Rose Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Zebra Jasper (Zebra Stone)
Tumbled Silicon Dioxide (SiO2) with impurities
sedimentary
Titanium Aura Quartz (Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2)
mineral
Nuummite
Orthoamphibole (Anthophyllite-Gedrite composition)
metamorphic
Citrine
SiO2 (Silicon Dioxide)
mineral
Diamond
Carbon (C)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Basalt
Basalt (Mafic Extrusive)
igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Blue Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Diamond (in jewelry)
Carbon (C)
mineral
Malachite
Copper carbonate hydroxide Cu2CO3(OH)2
mineral
Gold
Native Gold (Au)
mineral
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pyrite Geode
Iron Disulfide (FeS2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Gold in Matrix
Native Gold (Au)
mineral
Note: Item is a Synthetic/Man-made Object
Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)
Non-geological
Fossilized Shark Tooth (Basal Bone)
Otodus sp. (Mineralized Hydroxyapatite)
sedimentary
Chert (Flint)
Cryptocrystalline Silica (SiO2)
sedimentary
Basalt
Basalt (Mafic Extrusive)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Silver (Native Element / Alloy)
Silver (Ag)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
Mineral
Citrine
Crystalline Quartz (SiO2) with iron impurities
mineral