Carnelian
Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)
Category
Browse mineral, jewelry specimens identified by the Rock Identifier community.
Carnelian
Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
Chrysoprase
Silicon dioxide (SiO2) with nickel impurities
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
Quartz (Rutilated)
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Amazonite
Microcline (variety Amazonite), K(AlSi3O8)
Rose Quartz
Silicon Dioxide (SiO2)
Dendritic Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
Gold Ore
Native Gold (Au) in Matrix
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with artificial dye
Carnelian (Chalcedony)
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Quartz Pebbles and Agates
Silicon Dioxide (SiO2)
Grey Chalcedony (Agate)
Silicon Dioxide (SiO2)
Chalcedony (specifically Agate or Water-worn Quartzite)
Silicon Dioxide (SiO2)
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with dye
Fossil Shark Tooth
Selachii (fossilized dentition)
Turquoise
CuAl6(PO4)4(OH)8·4H2O
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Quartz
Silicon Dioxide (SiO2)
Fossil Seashell
Invertebrate fossil (Bivalvia)
Azurite and Malachite on Matrix
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Hematite (Concretion)
Iron(III) oxide (Fe2O3)
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
Milky Quartz
Silicon Dioxide (SiO2)
Cloudy Quartz (or Milky Quartz)
Silicon Dioxide (SiO2)
Rose Quartz
Silicon dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Dalmatian Jasper
Peralkaline rhyolite with arfvedsonite inclusions
Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Quartz (Pink/Orange Variety)
Silicon Dioxide (SiO2)
Raw Ruby (Corundum)
Corundum (Aluminum Oxide, Al2O3)
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Fossilized Coral
Rugosa / Scleractinia (Agatized or Calcitized Coral)
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
Ruby / Red Corundum
Al2O3 (Aluminum Oxide with Chromium trace)
Polished crescent-shaped stone pendant
Likely black jade, basalt, or other dark silicate stone; exact identification requires testing
Turquoise and Red Coral
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Corallium rubrum (Red Coral)