Rock Identifier

Category

Mineral And Glass

Browse mineral and glass specimens identified by the Rock Identifier community.

Learn about Mineral And Glass in the encyclopedia

Sideromelane

Black Obsidian

Maskelynite

Tachylite

Obsidian

Hyalite Opal

Perlite

Opalite

Macusanite

Pink Obsidian

Goldstone

Glauconite

Obsidian (Volcanic Glass (SiO2 rich)) — Igneous

Obsidian

Volcanic Glass (SiO2 rich)

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

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Likely amethyst crystal fragment (Quartz, SiO₂; purple coloration from iron-related defects and irradiation) — mineral

Likely amethyst crystal fragment

Quartz, SiO₂; purple coloration from iron-related defects and irradiation

Quartz (White/Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (White/Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Smoky or Clear variety with inclusions) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky or Clear variety with inclusions)

Silicon Dioxide (SiO2)

Snowflake Obsidian (Volcanic Glass (spherulitic obsidian)) — igneous

Snowflake Obsidian

Volcanic Glass (spherulitic obsidian)

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

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon dioxide (SiO2)) — mineral

Quartz Pebble

Silicon dioxide (SiO2)

Quartz pebble (Silicon dioxide, SiO2) — mineral

Quartz pebble

Silicon dioxide, SiO2

Purple Fluorite Octahedron (Fluorite (Calcium Fluoride, CaF2)) — mineral

Purple Fluorite Octahedron

Fluorite (Calcium Fluoride, CaF2)

Quartz Heart or Arrowhead Shape (Silicon Dioxide (SiO2)) — mineral

Quartz Heart or Arrowhead Shape

Silicon Dioxide (SiO2)

Quartz (Milky/Smoky variety on matrix) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky quartz (likely) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Quartz-rich iron-stained rock (Massive to drusy quartz (SiO₂) with iron-oxide coatings, likely limonite/goethite) — mineral

Quartz-rich iron-stained rock

Massive to drusy quartz (SiO₂) with iron-oxide coatings, likely limonite/goethite

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

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

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

Quartz Nut

SiO2 (Silicon Dioxide)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Milky quartz fragment (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz fragment

Quartz, silicon dioxide (SiO₂)

Strawberry Quartz and Rose Quartz (Silicon Dioxide (SiO2) with inclusions) — mineral

Strawberry Quartz and Rose Quartz

Silicon Dioxide (SiO2) with inclusions

Opalite (Synthetic glass (SiO2 + impurities)) — mineral

Opalite

Synthetic glass (SiO2 + impurities)

Tumbled carnelian agate (Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide coloration) — gemstone

Tumbled carnelian agate

Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide coloration

Quartz Pebbles (Silicon Dioxide (SiO2)) — mineral

Quartz Pebbles

Silicon Dioxide (SiO2)

Tumbled quartz pebble (probable) (Quartz, silicon dioxide (SiO₂)) — mineral

Tumbled quartz pebble (probable)

Quartz, silicon dioxide (SiO₂)

Orthoclase Feldspar with Quartz (Orthoclase (KAlSi3O8)) — mineral

Orthoclase Feldspar with Quartz

Orthoclase (KAlSi3O8)

Obsidian (Black) (Obsidian (High-silica volcanic glass)) — igneous

Obsidian (Black)

Obsidian (High-silica volcanic glass)

Quartz-rich pegmatite (milky quartz with feldspar) (Quartz (SiO₂)–feldspar pegmatite, likely containing albite or orthoclase) — igneous

Quartz-rich pegmatite (milky quartz with feldspar)

Quartz (SiO₂)–feldspar pegmatite, likely containing albite or orthoclase

Snowflake Obsidian (Vitreous volcanic rock with Cristobalite inclusions (mostly SiO2)) — igneous

Snowflake Obsidian

Vitreous volcanic rock with Cristobalite inclusions (mostly SiO2)

Snowflake Obsidian (Spherulitic Obsidian (primarily SiO2)) — igneous

Snowflake Obsidian

Spherulitic Obsidian (primarily SiO2)

Quartz crystal fragment (likely milky quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Amethyst druzy cluster (Amethyst, purple quartz (SiO₂)) — mineral

Amethyst druzy cluster

Amethyst, purple quartz (SiO₂)

Amethyst-bearing quartz (Quartz, SiO₂; purple coloration from trace iron and irradiation) — mineral

Amethyst-bearing quartz

Quartz, SiO₂; purple coloration from trace iron and irradiation

Pink quartz (likely rose quartz) (Quartz, silicon dioxide (SiO₂), typically massive rose quartz colored by trace elements and microscopic inclusions) — mineral

Pink quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂), typically massive rose quartz colored by trace elements and microscopic inclusions

Smoky Quartz (Vein Quartz) (Quartz (Silicon Dioxide, SiO2)) — mineral

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Citrine (Tumbled Quartz) (Silicon Dioxide (SiO2)) — mineral

Citrine (Tumbled Quartz)

Silicon Dioxide (SiO2)

Tektite (Tektite (Meteorite impact glass)) — meteorite

Tektite

Tektite (Meteorite impact glass)

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

Rose Quartz

Quartz (Silicon Dioxide, SiO2)

Rounded quartz-rich pebble (likely vein quartz or quartzite) (Quartz, silicon dioxide (SiO₂); possibly quartzite if metamorphic) — mineral

Rounded quartz-rich pebble (likely vein quartz or quartzite)

Quartz, silicon dioxide (SiO₂); possibly quartzite if metamorphic

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite (Clastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)