Chert (Iron-stained)
Microcrystalline quartz (SiO2)
sedimentary
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
Chalcedony Geode Fragment (Botryoidal)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Jasper (Yellow Jasper)
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
mineral
Ruby Fuchsite / Ruby in Fuchsite
Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix
Mineral
Garnet (likely Almandine or Pyrope)
Garnet Group, Nesosilicates (Complex chemistry, e.g., Almandine: Fe3Al2Si3O12)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
igneous
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mineraloid
Jasper
Microcrystalline Quartz (SiO2)
Sedimentary/Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz (Water-Worn Pebble)
Silicon Dioxide (SiO2)
mineral
Jasper
Jasper (Cryptocrystalline Quartz; SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Quartz (Smoky/Milky)
Silicon Dioxide (SiO2)
mineral
Green Moonstone (Garnierite)
Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)
mineral
Granite
Granite (felsic intrusive igneous rock)
igneous
Garnet in Quartz Matrix
Almandine Garnet (Fe3Al2(SiO4)3) in Quartz (SiO2)
metamorphic
Chrysocolla on Limonite Matrix
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) on FeO(OH)·nH2O (Limonite)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
White Moonstone (Feldspar)
Potassium aluminum silicate (KAlSi3O8)
mineral
Mahogany Obsidian
Volcanic Glass with Hematite inclusions (SiO2 + Fe2O3)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (vein quartz)
SiO2 (Silicon Dioxide)
Mineral
Grey Jasper (Tumbled Quartz variant)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Serpentinite (Serpentine Rock)
Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.
Metamorphic Rock
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Synthetic/Man-made Material
Ferruginous Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Granite
Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Chrysocolla on Quartz with Iron Oxides
Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)
mineral
Quartz
Silicon dioxide (SiO2)
Mineral
Malachite and Azurite on Gossan (Ironstone Matrix)
Cu2CO3(OH)2 (Malachite) on FeO(OH)·nH2O (Limonite/Gossan)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Serpentine (Serpentinite)
Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)
metamorphic