Tumbled Amethyst
Quartz (SiO2) with trace amounts of Iron (Fe)
mineral
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.
Learn about Man Made Glass (Often Grouped With Minerals In Lapidary) in the encyclopedia
View all →
Chalcedony (Agate/Carnelian type)
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Botryoidal chalcedony (likely white quartz/chalcedony)
Microcrystalline quartz, SiO₂; possibly partly altered carbonate or opaline silica
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
Mineral in a Metamorphic/Hydrothermal rock
Slag (Industrial Glass Slag)
Amorphous Silica / Ferro-silicate Slag
mineraloid / anthropogenic
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Quartz (Field Stone)
Silicon Dioxide (SiO2)
mineral
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Quartz (Gravel Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebbler
Quartzite (primarily SiO2)
metamorphic
Jasper
Quartz (SiO2) with impurities
sedimentary
Chalcedony (Smoky Quartz or Agate nodule fragment)
Silicon Dioxide (SiO2)
mineral
Blue Quartzite (Blue Aventurine)
Silicon Dioxide with Dumortierite/Crocidolite inclusions (SiO2)
metamorphic
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Bull Quartz)
Silicon Dioxide (SiO2)
mineral
Porous Quartzite
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Chert Nodule (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with inclusions of Chlorite or Actinolite
sedimentary
Tumbled white chalcedony (milky agate)
Microcrystalline quartz, SiO₂; chalcedony, locally grading toward milky agate
mineral
Tumbled quartz with iron-oxide staining
Quartz (SiO₂), locally stained by goethite/limonite
mineral
Red Jasper
Quartz (Silicon Dioxide) with Hematite inclusions, SiO2 + Fe2O3
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (Fe2O3 dominant staining)
sedimentary
Sandstone (with vugs)
Arenite / Sedimentary Sandstone
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled milky quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Red Jasper (Mookaite style)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Petrified Wood
Silicified Wood (primarily SiO₂ / Silicon Dioxide)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert Pebble with Quartz Veining
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Serpentine
Serpentine group ((Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Quartzite with Iron Staining
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 trace)
metamorphic
Sandstone
Arenite
sedimentary
Septarian Nodule (Septarian Dragon Stone)
Septarian concretion (composition: Calcite CaCO3, Aragonite CaCO3, and Limestone/Clay)
sedimentary
Obsidian
Obsidian (volcanic glass, amorphous silica rich rock)
Igneous