Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
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Wishing Stone (Basalt/Greywacke with Quartz Vein)
Basalt or Siltstone with SiO2 (Quartz) hydrothermal intrusion
igneous/sedimentary
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
Conglomerate
Clastic sedimentary rock (Polymictic Conglomerate)
sedimentary
Rhyolitic Tuff
Rhyolitic Tuff / Pyroclastic rock
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Anthropogenic (Man-made)
Agate
Agate (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Diamond
Diamond (C)
Mineral
Iron Meteorite
Siderite (Fe, Ni)
igneous
Quartz with Mica (Micaceous Quartz)
Silicon Dioxide (SiO2) with Phyllosilicates
igneous/metamorphic
Sandstone, Quartzite, and River Pebbles
Silicon Dioxide (SiO2) based Sedimentary/Metamorphic structures
Sedimentary and Metamorphic
K2 Stone (or K2 Jasper)
Azurite-in-Granite (Potassium Feldspar, Quartz, Plagioclase, Muscovite, and Azurite)
igneous
Epidote
Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Basalt Porphyry
Porphyritic Basalt
igneous
Conglomerate
Clastic Sedimentary Conglomerate (SiO2 based clasts in matrix)
sedimentary
Anthracite Coal
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Coal (Anthracite)
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Sandstone (likely Ferruginous)
Arenite (SiO2 based with Fe2O3/FeO(OH) cement)
sedimentary
Obsidian
Volcanic glass (high silica content based on SiO2)
igneous
Amber (specifically Red or Cherry Amber)
Succinite (Resinite); Chemical formula: C10H16O
Mineraloid
Dendritic Quartz Pebble
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Quartz (Iron-Stained or Milky)
Silicon Dioxide (SiO2)
mineral
Build-A-Bear Plush (Non-Geological)
Polyester fibers (C10H8O4)n and Synthetic Polymers
Anthropogenic / Non-mineral
Conglomerate
Clastic Sedimentary Conglomerate (SiO2 primarily)
sedimentary
Mixed Crushed Stone
Aggregate (varied mineral composition)
igneous and sedimentary mixture
Chert (and Chert-based Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sedimentary
Epidote
Epidote (formula: Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Schist (Oxidized)
Mica Schist with Iron Oxide staining
metamorphic
Calcite with Quartz coating
Calcium Carbonate (CaCO3) with Silicon Dioxide (SiO2)
mineral
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Basalt with Amygdaloidal Infilling
Porphyritic or Amygdaloidal Basalt
igneous
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (SiO2 + impurities)
sedimentary
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Ironstone (likely Ferruginous Siltstone/Sandstone)
Ferruginous sedimentary rock (FeOx-rich clastic)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Granite / Quartz Vein Rock
Granitoid with Quartz (SiO2)
igneous
Fossil Shark Tooth
Carcharodon sp. (likely Otodus or similar Lamniformes order)
sedimentary
Dragon Vein Agate
Silicon Dioxide (SiO2)
mineral