Blue glass-like gemstone specimen (likely dyed or synthetic quartz)
Uncertain; possibly blue-dyed quartz or synthetic glass, not confidently identifiable from the image
gemstone
Category
Man Made Material
Browse man made material specimens identified by the Rock Identifier community.
Learn about Man Made Material in the encyclopedia
View all →
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Diamond
Carbon (C)
mineral
Fluorite (Green Fluorite)
Calcium Fluoride (CaF2)
mineral
Zebra Jasper
Silicon Dioxide (SiO2) with inclusions
sedimentary
Smoky Quartz with Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)
mineral
Diamond (or Diamond Simulant)
Carbon (C) or Zirconium dioxide (ZrO2) for CZ
gemstone
Quartz (Smoky/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Diamond
Carbon (C)
gemstone
Rhodonite Tumbled Chips
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Greenstone (Metabalt)
Chlorite-actinolite schist (Greenstone)
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Diamond
Carbon (C)
gemstone
Diamond
Native Carbon (C)
gemstone
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Peridotite
Peridotite (varieties include Dunite, Lherzolite, Harzburgite)
igneous
Serpentine
Antigorite/Chrysotile group (Mg3Si2O5(OH)4)
metamorphic
Diamond
Diamond (C)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Flint Pebble
SiO2 (Microcrystalline Quartz / Chalcedony)
sedimentary
Chert (Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Quartz Variety)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Jasper and Chert Conglomerate
Ferruginous Microcrystalline Quartz (SiO2)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Crushed Limestone
Sedimentary Calcite/Dolomite Rock (CaCO3)
sedimentary
Limestone
Calcite (CaCO3)
sedimentary
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Siltstone or Mudstone
Siltstone (composed primarily of silt-sized particles)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 with minor iron oxides)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic