Yellow Jasper (Limonite-stained Chert)
Silicon Dioxide (SiO2) with Limonite/Goethite inclusions
sedimentary
Category
Anthropogenic Specimen (Man Made)
Browse anthropogenic specimen (man made) specimens identified by the Rock Identifier community.
Gold Ore in Matrix
Native Gold (Au) in Quartz/Host Rock
mineral
Riverstone Quartzite (Water-worn Siltstone/Quartzite)
Metamorphosed Quartz-rich Arenite (SiO2)
metamorphic
Chert (specifically Agate/Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Ferruginous Quartz (River Pebble)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary (secondary classification for a weathered mineral specimen)
Jasper
Jasper (SiO2 plus impurities)
sedimentary
Lunar Highlands Breccia (Meteorite)
Lunar Feldspathic Breccia
igneous
Chalcedony (Common Opal or Agate variant)
Silicon Dioxide (SiO₂)
mineral
Rough Corundum (likely Sapphire/Zircon-bearing)
Aluminium Oxide (Al2O3)
mineral
Jasper (Green variety)
Silicon Dioxide (SiO₂)
sedimentary
Gold (in Opaque Matrix/Jewelry)
Native Gold (Au)
mineral
Milky Quartz Pebble (Tumbled Quartzite)
Silicon Dioxide (SiO2)
mineral
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Jasper (Banded Argillite/Chert mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Septarian Nodules / Weathered Silex)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Agate Geode / Thunderegg
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Vesicular Basalt with Lichen
Vesicular Basalt
igneous
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Synthetic/Amorphous Solid
Chert (with Lichen)
Microcrystalline Quartz (SiO2)
sedimentary
Greenstone (Rough Jadeite or Nephrite)
Sodium aluminum silicate (Jadeite) / Calcium magnesium iron silicate (Nephrite)
metamorphic
Banded Agate (specifically Black Sardonyx/Onyx variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron traces)
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Banded Calcite (often marketed as Mexican Onyx or Onyx Marble)
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Chert (and Limestone)
Silicon Dioxide (SiO2)
sedimentary
Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
Mineral in Metamorphic/Igneous Host
Quartz (Iron-Stained or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (Quartz Pebble)
Silicon Dioxide (SiO2)
sedimentary
Smoky Quartz (Rough Specimen)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Epidote or Chlorite inclusions
Silicon Dioxide (SiO2) with inclusions of Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Basalt (with possible mineral veining)
Basalt (Aphanitic Mafic Igneous Rock)
Igneous
Basalt (River Pebble)
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Sandstone (likely Quartzose type)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Agate (specifically Carnelian Agate or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide staining (Fe2O3)
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Carnelian (Chalcedony)
Cryptocrystalline Quartz (SiO2) with Iron Oxide impurities
mineral