Blue Opal Inlay (Simulated/Lab-created)
Hydrated Amorphous Silica (SiO2·nH2O) with polymer resin
mineraloid
Category
Sedimentary (Chemically Precipitated Mineral)
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Chemically Precipitated Mineral) in the encyclopedia
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Orange calcite fragment
Calcite (CaCO₃), likely iron-stained or orange-colored calcite
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Weathered iron-rich rock, possibly meteorite
Uncertain; likely goethite/hematite-rich material, with meteorite possibility
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Limonite-stained Chert
Microcrystalline Quartz (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
sedimentary
Azurite Malachite
Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)
mineral
Amethyst (Rose de France)
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Grey River Stone (Quartz-rich Quartzite/Siltstone)
Quartzite / Meta-siltstone (primarily SiO2)
Metamorphic (low-grade)
Carnelian
Carnelian (a variety of Chalcedony, SiO₂)
Mineral
Azurite
Azurite (Cu3(CO3)2(OH)2)
mineral
Opalite
Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)
mineral
Amygdaloidal Basalt
Vesicular Basalt with Amygdules
igneous
Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
mineral
Quartz with Arsenopyrite
Silicon Dioxide (SiO2) with Iron Arsenic Sulfide (FeAsS)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
sedimentary
Beach Pebbles and Quartz Aggregates
Quartz / Calcite Beach Pebbles (SiO2 / CaCO3)
sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Yellow Jasper
Chalcedony (SiO2 with iron oxide inclusions)
sedimentary
Agate Pebble (Desert Agate / Chalcedony Nodule)
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite (or Chert/Flint gravel)
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Chert Arrowhead (Projectile Point)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint/Novaculite)
Microcrystalline Quartz (SiO2)
sedimentary
Chert
Microcrystalline silica (SiO2)
sedimentary
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Common Opal transition)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Chert / Chalcedony Nodules
Microcrystalline Quartz (SiO2)
sedimentary
Orange Moss Agate / Carnelian Agate
Silicon dioxide (SiO2) - variety Chalcedony
sedimentary
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Siltstone with Iron Staining
Siltstone
sedimentary
Limestone (River Pebble / Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral
Quartz
Silicon Dioxide (SiO₂)
Mineral
Bauxite
Hydrated aluminium oxides mixture (primarily gibbsite, boehmite, and diaspore)
sedimentary
Limestone Cobble
Carbonate Rock (CaCO3)
sedimentary
Large calcite crystal cluster
Calcite (calcium carbonate, CaCO₃)
mineral