Moonstone (Feldspar variety)
Orthoclase Feldspar (KAlSi3O8)
mineral
Category
Mineral (Specifically A Mineraloid)
Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
mineral
Montana Moss Agate
Chalcedony (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Moonstone (specifically Cat's Eye or Gray Moonstone)
Orthoclase (Potassium Aluminum Silicate) with the formula (K,Na)AlSi3O8
mineral
Orange Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Mookaite Jasper
Radiolarite (Silicon Dioxide, SiO2)
sedimentary
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
metamorphic
Black Pearl (Tahitian-style Cultured Pearl)
Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)
mineral
Amazonite
K(AlSi3O8) - Potassium Feldspar (Microcline variant)
mineral
Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Sunstone with Black Tourmaline (Arfvedsonite)
Feldspar (Na,Ca)(Al,Si)4O8 with Schorl Na(Fe3+)3Al6(Si6O18)(BO3)3(OH)3(OH)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Citrine
Silicon Dioxide (SiO2) with iron impurities
mineral
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Jadeite (Jade)
Jadeite (NaAlSi2O6)
metamorphic
Chlorastrolite (Isle Royale Greenstone)
Chlorastrolite (Pumpellyite-(Mg,Al)), formula: Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2∙H2O
mineral
Limestone (specifically a Crushed Aggregate fragment)
Calcium Carbonate (CaCO3)
sedimentary
Chert (specifically a Worked Flint/Knapped Flake)
Chert / Flint (Microcrystalline Quartz, SiO2)
sedimentary
Jasper Agate
Silicon dioxide (SiO2)
mineral
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8) with inclusions
mineral
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Septarian Nodule (Yellow Jasper variety)
Septarian Nodule (comprising Calcite, Aragonite, and Limestone/Bentonite)
sedimentary
Chert (Black Chert/Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Sardonyx Cameo
Silicon Dioxide (SiO2) - variety Cryptocrystalline Quartz
Mineral
Jasper (Yellow Jasper)
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Ruby (Pink to Red Corundum)
Al2O3 (Corundum with Chromium impurities)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Charoite
Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)
metamorphic
Granodiorite
Granodiorite (Intermediate to Felsic Intrusive Rock)
igneous
Vesicular Basalt (Scoria)
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Sandstone (Graywacke)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Obsidian
Volcanic Glass (SiO2 + minor impurities)
igneous
Quartz / Chert
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Amazonite
Amazonite (KAlSi3O8, a variety of Microcline)
mineral
Amethyst (Chevron Amethyst)
Amethystine Quartz (SiO2)
mineral
Ruby in Zoisite
Anyolite (combination of Ca2Al3(SiO4)3(OH) and Al2O3:Cr)
metamorphic
Sunstone (Oregon Sunstone)
Labradorite (Feldspar variety) - (Ca, Na)(Al, Si)4O8
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock