Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Category
Igneous, Sedimentary, Or Metamorphic (Mineral Based)
Browse igneous, sedimentary, or metamorphic (mineral based) specimens identified by the Rock Identifier community.
Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Ruby
Corundum (Al2O3) with Chromium traces
mineral
Tree Agate
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Chert (with Limestone and Iron Oxide staining)
Cryptocrystalline Quartz (SiO2)
sedimentary
Druzy Quartz (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
mineral
Greisen (Quartz-Muscovite-Turretine Rock)
Greisen
Metamorphic Rock
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Lapis Lazuli (blue bead) and Moss Agate (green heart)
Lapis Lazuli (lazurite-based rock) and Moss Agate (SiO2 with manganese/iron inclusions)
metamorphic (Lapis) and sedimentary/igneous assoc. (Moss Agate)
Limestone (Ocherous)
Calcium Carbonate (CaCO3) with Iron Oxide (Limonite)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Hematite (Fe2O3)
Mineral
Marble
Metamorphosed Limestone (calcite formulation CaCO3)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Diorite (River Pebble)
Intermediate plutonic igneous rock
igneous
Orthoclase Feldspar (or K-Feldspar)
Orthoclase (KAlSi3O8)
Mineral
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
igneous
Granite
Plutonic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Sapphire (Raw/Rough)
Corundum (Al2O3)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Montana Moss Agate
Chalcedony (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Diorite
Diorite
igneous
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Smoky Quartz
Smoky Quartz (SiO2)
mineral
Prasiolite
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amazonite
K(AlSi3O8) - Lead-bearing Microcline (Tectosilicate)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral