Specular Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Category
Mixed: Igneous And Sedimentary
Browse mixed: igneous and sedimentary specimens identified by the Rock Identifier community.
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Red Jasper
Silicon dioxide (SiO2) with Iron inclusions
mineral
Carnelian
Carnelian (Chalcedony / SiO2)
mineral
Chalcedony (Botryoidal Agate)
Silicon Dioxide (SiO2)
mineral
Green Chalcedony (likely Green Agate or Chrysoprase)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Pyrite-rich Ore
Pyrite (FeS2) with secondary minerals
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Sulfur (with possible Cullet Glass or Slag imitation)
Native Sulfur (S8)
mineral
Carnelian
Carnelian (SiO2 with Iron Oxide impurities)
mineral
Carnelian
Carnelian (SiO2 - Silicon Dioxide)
mineral
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Moonstone (Tumbled)
Orthoclase (Potassium Feldspar) - (K,Na)AlSi3O8
mineral
Smoky Quartz with Inclusions
Silicon Dioxide (SiO2)
mineral
Dyed Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (Rough Specimen)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (with potential iron inclusions)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Moonstone
Orthoclase (Potassium aluminum silicate - KAlSi3O8)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Granite
igneous
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Yellow Chert (River Stone)
Chert (SiO2)
sedimentary
Limonite (Iron Ore)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral
Chert (or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-bearing Clastic Sedimentary Rock)
sedimentary
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Limestone (Concretionary or Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Weathered Cobble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary