Chert (Jasper)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Chert (Jasper)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
Black Freshwater Pearls
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Green Kyanite
Kyanite (Al2SiO5)
Picture Jasper
Silicon Dioxide (SiO2)
Jasper (Iron-stained Chalcedony)
SiO2 with Fe2O3 (Iron Oxide) impurities
Blue Sapphire
Corundum (Al2O3 with iron and titanium trace elements)
Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)
Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)
Rose Quartz
Rose Quartz (SiO₂)
Orange Sapphire
Corundum (Al2O3)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Yellow Jasper
Silicon Dioxide (SiO2)
Schorl (Black Tourmaline) in Quartz/Feldspar Matrix
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
Yellow Jasper
Silicon Dioxide (SiO2) with goethite/iron oxide inclusions
Milky Quartz / Rose Quartz fragment
Silicon Dioxide (SiO2)
Chert / Flint
Silicon Dioxide (SiO2)
Black Jasper
Silicon Dioxide (SiO2) with impurities
Chert (Flint)
Chert (SiO2)
Pearl (Biogenic Mineral)
Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3
Polished orange chalcedony (likely carnelian)
Microcrystalline quartz, SiO₂; iron-stained chalcedony
Jasper
Jasper (Silicon Dioxide, SiO2)
Poppy Jasper
Silicon Dioxide (SiO2) with Hematite and Iron Oxide inclusions
Peridot (likely, given the color and bead form)
Olivine, variety Peridot (Mg,Fe)2SiO4
Quartz
Quartz (Silicon Dioxide, SiO2)
Lace Agate (specifically Red Lace Agate)
Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz
Moss agate bracelet
Chalcedony (microcrystalline quartz, SiO₂) with chlorite/amphibole inclusions
Carnelian Bead
Silicon Dioxide (Chalcedony variety), SiO2
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Chert (Flint)
Chert (SiO2)
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)
Yellow Aventurine
Quartzite with inclusions (SiO2)
Rose Quartz (tumbled)
Rose Quartz (variety of Quartz, chemical formula SiO₂)
Granite (Unakite / Pink Feldspar Granite)
Granite (Plutonic Igneous Rock)
Garnet (Almandine variety)
Almandine, Fe3Al2(SiO4)3
Rose Quartz
SiO2 (Crystalline Quartz with trace inclusions)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Jasper (Red-Brown Variety)
Microcrystalline Quartz (SiO2) with high Iron Oxide content
Rose Quartz
Silicon dioxide (SiO2)
Labradorite (Larvikite variety)
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8 with Monzonite/Syenite matrix
Milky Quartz
Silicon Dioxide (SiO2)
Green Agate
Silicon dioxide (SiO₂)
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar
Garnet
Garnet group [X3Y2(SiO4)3]