Green Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Mineral Health
Browse mineral health specimens identified by the Rock Identifier community.
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Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Dyed Tumbled Quartz
Silicon Dioxide (SiO2) with artificial pigment
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Moonstone
Orthoclase (KAlSi3O8), specifically the variety showing adularescence
mineral
Moonstone
Adularia / Orthoclase (KAlSi3O8)
mineral
Argetine Blue Agate (Chalcendony variant)
Silicon Dioxide (SiO₂)
mineral
Rough Amethyst Quartz
Silicon Dioxide with Iron impurities (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Blue Lace Agate
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartz Geode (Druzy)
Crystalline Silicon Dioxide (SiO2)
mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Ruby in Zoisite (Anyolite)
Anyolite (Combination of Corundum and Zoisite)
metamorphic
Sapphire (Raw/Rough)
Corundum (Al2O3)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Fossilized Shark Tooth (Basal Bone)
Otodus sp. (Mineralized Hydroxyapatite)
sedimentary
Quartzite with Glauconitic or Iron staining
Quartzite (SiO2 with accessory minerals)
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt containing Zeolite or Quartz (SiO2/Silicates)
igneous
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Mineral/Metamorphic Substrate
Rough Quartz (Milky Quartz Pebbles)
Silicon Dioxide (SiO2)
mineral
Calcite on Limestone
Calcium Carbonate (CaCO3) on Sedimentary Rock
mineral
Amazonite
Microcline (K(AlSi3O8))
mineral
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate - Be3Al2(SiO3)6)
mineral
Lake Superior Agate
Silicon Dioxide (Cryptocrystalline Quartz), SiO2
mineral
Banded Agate with Drusy Quartz
Cryptocrystalline Quartz (SiO2) with macrocrystalline Quartz
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Amazonite
Microcline (KAlSi3O8) with Pb impurities
mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Fire Opal (in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Chert (Flint Pebbles)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Iron-Stained)
Crystalline Silicon Dioxide (SiO2)
mineral
Sunstone
Oligoclase (Plagioclase Feldspar), (Ca,Na)(Al,Si)4O8
mineral
Amethyst
Quartz (Silicon Dioxide with Iron impurities), SiO2
mineral
Amazonite
KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)
mineral
Jasper
Silicon dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral