Rock Identifier

Category

Synthetic Glass (Often Categorized As A Simulated Mineral)

Browse synthetic glass (often categorized as a simulated mineral) specimens identified by the Rock Identifier community.

Learn about Synthetic Glass (Often Categorized As A Simulated Mineral) in the encyclopedia

Opalite

Sideromelane

Pele's Tears

Porphyritic Obsidian

Porphyritic Obsidian

Anatase

Red Obsidian

Euxenite

Gray Obsidian

Gold Sheen Obsidian

Pink Lady Obsidian

Zircon

Aventurine

Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone. (SiO2 (Silicon Dioxide)) — Mineral or Sedimentary (if chert)

Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone.

SiO2 (Silicon Dioxide)

Mineral or Sedimentary (if chert)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (with Arkose characteristics) (Clastic sedimentary rock (SiO2 with KAlSi3O8)) — sedimentary

Sandstone (with Arkose characteristics)

Clastic sedimentary rock (SiO2 with KAlSi3O8)

Orthoclase Feldspar (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Fluorite with Quartz (Fluorite (CaF2) and Quartz (SiO2)) — mineral

Fluorite with Quartz

Fluorite (CaF2) and Quartz (SiO2)

Sandstone (Ferruginous Concretion) (Arenite (with iron oxide cement)) — sedimentary

Sandstone (Ferruginous Concretion)

Arenite (with iron oxide cement)

Obsidian (Volcanic glass (SiO2-rich)) — igneous

Obsidian

Volcanic glass (SiO2-rich)

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Faceted colorless gemstone, likely quartz (rock crystal) or synthetic glass imitation (Quartz: silicon dioxide (SiO₂), trigonal crystal system; exact identity cannot be confirmed visually) — gemstone

Faceted colorless gemstone, likely quartz (rock crystal) or synthetic glass imitation

Quartz: silicon dioxide (SiO₂), trigonal crystal system; exact identity cannot be confirmed visually

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Tumbled Clear Quartz/Rock Crystal (Silicon Dioxide (SiO2)) — mineral

Tumbled Clear Quartz/Rock Crystal

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Jasper / Chert (river tumbled) (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper / Chert (river tumbled)

Microcrystalline Quartz (SiO2)

Blue Obsidian (Cullet Glass) (Silicon Dioxide (Amorphous Glass)) — mineral

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Smoky Quartz with Calcite/Quartz Veining (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz with Calcite/Quartz Veining

Silicon Dioxide (SiO2)

Quartz (Milky/Smoky mix) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Smoky mix)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Jasper (SiO2 (Cryptocrystalline quartz)) — mineral

Jasper

SiO2 (Cryptocrystalline quartz)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Grain (Silicon Dioxide (SiO2)) — mineral

Quartz Grain

Silicon Dioxide (SiO2)

Blue Slag Glass (Ferro-silicate glass (Slag)) — igneous (man-made/industrial)

Blue Slag Glass

Ferro-silicate glass (Slag)

igneous (man-made/industrial)

Quartz (Clear Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Potassium Feldspar (Orthoclase) (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Lepidolite (K(Li,Al)3(Al,Si,4)10(O,F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,4)10(O,F,OH)2

Quartz (Citrine or Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Tektite (Natural impact glass) — meteorite

Tektite

Natural impact glass

Quartz Nut (SiO2 (Silicon Dioxide)) — mineral health

Quartz Nut

SiO2 (Silicon Dioxide)

Fluorite (specifically Blue John or Banded Fluorite) (Calcium Fluoride (CaF2)) — mineral

Fluorite (specifically Blue John or Banded Fluorite)

Calcium Fluoride (CaF2)

Lepidolite (K(Li,Al)3(Si,Al)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Si,Al)4O10(F,OH)2

Picture Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz / Chert (Silicon Dioxide (SiO2)) — Mineral / Sedimentary

Quartz / Chert

Silicon Dioxide (SiO2)

Mineral / Sedimentary

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Quartz with iron staining (Silicon dioxide (SiO2)) — mineral

Quartz with iron staining

Silicon dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Raw pale-green crystal, likely fluorite (Fluorite (calcium fluoride, CaF₂)) — mineral

Raw pale-green crystal, likely fluorite

Fluorite (calcium fluoride, CaF₂)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Agate (SiO2) — Mineral

Agate

SiO2

Quartz (Yellow/Citrine Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Yellow/Citrine Variety)

Silicon Dioxide (SiO2)