Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Category
Man Made Object (Simulant)
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Petrified Wood
Silicified Wood (SiO2)
fossil
Howlite
Ca2B5SiO9(OH)5
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Lapis Lazuli
Lapis Lazuli (Complex rock containing Sodalite, Lazurite, Calcite, and Pyrite)
metamorphic
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Agate
Silicon Dioxide (SiO2)
mineral
Larvikite
Larvikite (Augite Syenite)
igneous
Labradorite in Matrix
(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral](https://media.rockidentification.com/59eef03b-830e-4d54-8641-241ee77e8bf0-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
mineral
Greenschist (Greenstone)
Chlorite schist (primarily Chlorite-Epidote-Actinolite-Albite)
metamorphic
Yellow Jasper
SiO2 (Silicon Dioxide)
sedimentary
Ocean Jasper
Silicon Dioxide (SiO2)
Mineral_variety_of_Chalcedony
Crackled Quartz (Blue Dyed)
Silicon Dioxide (SiO2) with anthropogenic dye
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Iceland Spar (Optical Calcite)
Calcite (CaCO3)
mineral
Chert (Jasper / Quartz pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Lithic Tool)
Microcrystalline quartz (SiO2) - Archeological lithic artifact
sedimentary
Pearl (with Peridot)
Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4
mineral
Chert (Iron-stained)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Chalk
CaCO3 (primarily Calcium Carbonate), biogenic sedimentary rock
Sedimentary
Common Marble
Calcium Carbonate (CaCO3)
metamorphic
Chert (and Jasper/Flint variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Polished copper-bearing mineral specimen, likely malachite-rich copper ore
Malachite, Cu₂CO₃(OH)₂, possibly mixed with chrysocolla or limonite
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Ironstone (Limonitic Sandstone)
Ferruginous Sandstone (rich in Limonite: FeO(OH)·nH2O)
sedimentary
Tumbled brown chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Selenite (gypsum)
Gypsum, CaSO₄·2H₂O; variety commonly called satin spar or selenite
mineral
Obsidian (likely blue-sheen or coated obsidian)
Volcanic glass; primarily rhyolitic silica glass (SiO₂-rich, noncrystalline)
igneous
Polished dark-green stone, possibly serpentine or nephrite jade
Serpentine-group minerals, commonly antigorite/lizardite; possible nephrite (actinolite–tremolite amphibole)
metamorphic
Blue-green fluorite crystal
Fluorite (calcium fluoride, CaF₂)
mineral
Tumbled red jasper
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
mineral
Polished carnelian/chalcedony
Carnelian, a red-orange variety of microcrystalline quartz (SiO₂)
gemstone
Tumbled brown jasper
Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions
mineral
Polished red jasper pebble
Jasper, microcrystalline quartz (SiO₂) colored mainly by hematite/goethite
metamorphic
Tumbled carnelian
Carnelian, orange-red variety of cryptocrystalline chalcedony (SiO₂)
gemstone