Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Red Jasper Concretion
Cryptocrystalline Quartz (SiO2)
Sandstone
Arenite
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Chert (specifically Iron-stained River Cobble)
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Yellow Quartz (Citrine Quartz variety / Ferruginous Quartz)
Silicon Dioxide (SiO2) with iron inclusions
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Agate
Chalcedony (Microcrystalline Quartz) - SiO2
River Quartz (Milky and Smoky mix)
Silicon Dioxide (SiO2)
Black Tourmaline
Schorl (Na(Fe2+)_{3}Al_{6} (BO_{3})_{3} (Si_{6}O_{18})(OH)_{4})
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
Rhodonite in Quartz Matrix
Rhodonite (Manganese Iron Magnesium Calcium Silicate - Mn,Fe,Mg,Ca)SiO3
Sandstone
Clastic sedimentary rock (primarily SiO2)
Quartz on Matrix
Silicon Dioxide (SiO2)
Quartz (specifically Citrine or Yellow Quartzite pebble)
Silicon Dioxide (SiO2)
Sodalite in Matrix (Sunset Sodalite)
Sodalite Na8(Al6Si6O24)Cl2
Jasper
Silicon Dioxide (SiO2)
Amethyst
Amethyst (Silicon Dioxide - SiO2)
Carnelian (Agate)
SiO2 (Silicon Dioxide with Iron Oxide impurities)
Jasper
Jasper (Silicon Dioxide, SiO2)
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite mica
Agate
SiO2
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Jasper
Silicon dioxide (SiO2)
Rhodonite
Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn
Rose Quartz
Silicon Dioxide (SiO2)
Blue Lace Agate (Chert/Chalcedony)
Silicon dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Selenite (Satin Spar)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Moss Agate
Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)
Rose Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Smoky Quartz (SiO2)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Quartz Pebble
Silicon Dioxide (SiO2)
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2)
Quartz
Silicon dioxide (SiO2)
Green Calcite
Calcium Carbonate (CaCO3)
Zebra Jasper
Tetragonal Silicon Dioxide (Quartz) with impurities
Fire Quartz (Hematoid Quartz)
Quartz with Hematite inclusions (SiO2 + Fe2O3)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide staining/cementing)