Amethyst
Amethyst (Silicon Dioxide - SiO2 with impurities of iron)
mineral
Category
Mineral Side Rock
Browse mineral side rock specimens identified by the Rock Identifier community.
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Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide - SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst (Pale/Lavender variety)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Agate (specifically, a slice of a Blue Lace or Chalcedony Agate nodule)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
mineral
Quartz (Double-Terminated)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Double Terminated)
Silicon Dioxide (SiO2)
mineral
Amethyst Quartz
Amethyst (SiO2 with Iron impurities)
mineral
Quartz Crystal Cluster
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2) / Rock Crystal
mineral
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities and natural radiation influence)
mineral
Garnet (Almandine)
Almandine, Fe3Al2Si3O12
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2(SiO3)6)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Clear / Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Basalt Arrowhead (worked stone)
Aphanitic mafic volcanic rock (Basalt)
igneous
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Clear Quartz with iron/hematite staining)
Silicon Dioxide (SiO2)
mineral
Quartz (possibly milky quartz or quartz with inclusions)
SiO2 (Silicon Dioxide)
Mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz with inclusions
SiO2
mineral
Rough Garnet in Matrix
Almandine Garnet (Fe3Al2Si3O12)
mineral
Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Petoskey Stone
Hexagonaria percarinata
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Granodiorite Core
Granodiorite
igneous
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Epidote with Magnetite/Hematite inclusions
Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides
mineral