Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Category
Not A Geological Specimen
Browse not a geological specimen specimens identified by the Rock Identifier community.
Amethyst or Smoky Quartz Geode Slice
Crystalline Silicon Dioxide (SiO2) with iron impurities
mineral
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Cryptocrystalline Quartz (Agate/Chert)
Silicon dioxide (SiO2)
sedimentary
Chert (Nodular Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Granite
igneous
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Hand-Drawn Trading Card (Amateur Artwork)
Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)
Organic/Synthetic Composite (Paper and Pigment)
Flower Jasper
Agatized Fossil Coral / Chalcedony (SiO2)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities and gamma radiation exposure
Mineral
Agate Geode
Cryptocrystalline Quartz (SiO2)
mineral
Honey Calcite (Orange Onyx)
Calcium Carbonate (CaCO3)
mineral
Turritella Agate (Calligrapher Stone)
Silicified Elimia tenera (Chalcedony/Quartz)
sedimentary
Iron Meteorite
Siderite (Iron-Nickel Alloy), predominantly Kamacite and Taenite (Fe, Ni)
mineral
Rough Garnet (likely Almandine or Pyrope)
Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3
mineral
Pink Granite
Phaneritic intrusive felsic igneous rock
igneous
Epidote in Matrix (likely Amphibolite or Gneiss)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Metamorphic Matrix
metamorphic
Agate Geode
Microcrystalline Quartz (SiO2)
mineral
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Chert (Fossiliferous)
Silicon Dioxide (SiO2)
sedimentary
Marble
Recrystallized Calcite / Dolomite (CaCO3)
metamorphic
Milky Quartz (Water-Worn Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone with Magnetite and Iron Staining
Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)
sedimentary
Gold Nugget
Native Gold (Au)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper (with Agate/Chalcedony inclusions)
Silicon Dioxide (SiO2)
sedimentary
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Yellow Chert (Jasper)
Chalcedony (SiO2) with iron oxide inclusions
sedimentary
Calcite
Calcite (CaCO3)
Mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Metamorphosed Sandstone (Mainly SiO2)
metamorphic
Milky Quartz (Water-worn pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt with Iron Oxidation
Mafic Igneous Basalt
igneous
Chert (often called Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Amethyst (Geode)
Silicon Dioxide (SiO2) with iron impurities
mineral
Hematite
Hematite (Fe2O3)
mineral
Purple Agate (Dyed Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral