Boulder Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Category
Mineral (Synthetic Paper And Ink Polymorph)
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Learn about Mineral (Synthetic Paper And Ink Polymorph) in the encyclopedia
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Amazonite
KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Moqui Marble
Hematite Concretion (Iron Oxide Concretion)
sedimentary
Sunstone
Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Carnelian Agate
Chalcedony (SiO2 with Iron Oxide impurities)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Black Opal
Hydrated Silica (SiO2·nH2O)
mineral
Basalt with Hematite staining
Extrusive mafic igneous rock with Fe2O3
igneous
Native Gold Flake
Gold (Au)
mineral
Onyx
Chalcedony (SiO2)
mineral
Gold Nugget
Gold (Au)
mineral
Gold
Gold (Au)
mineral
Dyed Agate
Chalcedony (SiO2)
mineral
White Quartz Beads
Silicon Dioxide (SiO2)
mineral
Plume Agate or Moss Agate
Agate (SiO2)
mineral
Rutilated Quartz Bracelet
Quartz (Silicon Dioxide, SiO2) with inclusions of Rutile (Titanium Dioxide, TiO2)
gemstone
Quartz (Golden Quartz / Citrine / Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Blue Diamond
Carbon (C) with trace Boron
mineral
Blue Dumortierite in Quartz
Al7(BO3)(SiO4)3O3 (Dumortierite)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Geode half
Geode (often quartz/chalcedony based)
sedimentary or igneous
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Dyed Blue Agate Slice
Silicon Dioxide (SiO2) - Variety Agate
mineral
Dyed Agate
Agate (Silicon Dioxide, SiO2)
Mineral
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Magnetite / Hematite (Iron Ore)
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Olivine in Basalt matrix
Peridotite (Mg, Fe)2SiO4
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Schist
Schist (variety likely Mica Schist)
metamorphic
Dendritic Quartz
Silicon Dioxide (SiO2) with Manganese Oxide inclusions
mineral
Quartz Crystal Cluster (with Selenite Satin Spar)
Silicon Dioxide (SiO2)
mineral
Amber
Succinate (Fossilized Resin)
mineral
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Bicolor Quartz Tumble
Silicon Dioxide (SiO2)
mineral