Chert (varietal: Jasper or Flint)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
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Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Basalt with Epidote (Greenstone)
Amygdaloidal Basalt (Ca2(Al, Fe)3(SiO4)3(OH) inclusions)
igneous
Banded Chert
Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)
Sedimentary
Tiger's Eye (with Blue Tiger's Eye / Hawk's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Jadeite (Jade)
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Sandstone
Arenite (Sedimentary rock comprising sand-sized grains)
sedimentary
Fossil Shark Tooth
Carcharocles or Lamniformes (order)
fossil
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Chert (varieties include Flint and Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Banded Chert (or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinates (Organic Fossilized Resin)
mineral
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Chalcedony/Agate variety)
Silicon dioxide (SiO2)
sedimentary
Amber
Succinite
mineral
Black Pearl (Tahitian Pearl)
Aragonite / Calcite (CaCO3) with Conchiolin
mineral
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Amber
Succinite (Resin C10H16O)
mineral
Jasper (Green Jasper/Chert)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (likely Quartzose Sandstone pebble)
Arenite (primarily SiO2)
sedimentary
Limestone (specifically Fossiliferous or Crinoidal Limestone)
Calcium Carbonate (CaCO3) - Calcite Rock
sedimentary
Megalodon Shark Tooth Fossil
Otodus megalodon
sedimentary
Amber
Succinite (a common variety of fossilized resin)
mineral
Amber
Succinite (fossilized resin)
mineral
Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)
Mixed Silicates and Sulfides (SiO2, FeS2)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
mineral
Fancy Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Amber
Organic gemstone (Succinite)
mineral
Epidosite (Epidote-Quartz rock)
Epidote-rich hydrothermal rock
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Fe2O3)
mineral
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
mineral
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Fossilized Coral (Favosites)
Favosites goldfussi / Tabulata
sedimentary