Rock Identifier

Category

Mineralological Variety

Browse mineralological variety specimens identified by the Rock Identifier community.

Learn about Mineralological Variety in the encyclopedia

Albite

Flame Obsidian

Lace Obsidian

Oligoclase

Brookite

Sodalite

Syenite

Microcline

Leopard Obsidian

Orthoclase

Starry Night Obsidian

Pumpkin Obsidian

Pumpkin Obsidian

Polished jasper pebble (Jasper, microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions) — mineral

Polished jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)

Blue Topaz (Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)) — gemstone

Blue Topaz

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

Smoky quartz chips (Quartz, SiO₂ (smoky variety)) — mineral

Smoky quartz chips

Quartz, SiO₂ (smoky variety)

Tumbled yellow jasper (probable) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides) — mineral

Tumbled yellow jasper (probable)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Tumbled jasper (likely red/brown jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides) — mineral

Tumbled jasper (likely red/brown jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Red jasper (Microcrystalline quartz (chalcedony), SiO₂, colored mainly by iron oxides) — mineral

Red jasper

Microcrystalline quartz (chalcedony), SiO₂, colored mainly by iron oxides

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

Satin Spar (Selenite) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Green chalcedony (likely dyed or treated) (Chalcedony, microcrystalline quartz (SiO₂)) — gemstone

Green chalcedony (likely dyed or treated)

Chalcedony, microcrystalline quartz (SiO₂)

Jasper (likely brecciated jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides) — mineral

Jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Polished chalcedony (likely moss or dendritic agate) (Microcrystalline quartz, SiO₂, with iron/manganese oxide inclusions) — mineral

Polished chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron/manganese oxide inclusions

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Tumbled amethyst (Amethyst, purple variety of quartz (SiO₂)) — gemstone

Tumbled amethyst

Amethyst, purple variety of quartz (SiO₂)

Chert or flint (Microcrystalline quartz (SiO₂), often chalcedony) — sedimentary

Chert or flint

Microcrystalline quartz (SiO₂), often chalcedony

Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Polished agate slab (likely moss or plume agate) (Microcrystalline quartz, SiO₂; chalcedony with possible iron-oxide inclusions) — mineral

Polished agate slab (likely moss or plume agate)

Microcrystalline quartz, SiO₂; chalcedony with possible iron-oxide inclusions

Tumbled brown agate (possible carnelian or chalcedony) (Microcrystalline quartz, SiO₂; agate is banded chalcedony) — mineral

Tumbled brown agate (possible carnelian or chalcedony)

Microcrystalline quartz, SiO₂; agate is banded chalcedony

Labradorite ((Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)) — mineral

Labradorite

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Tumbled amethyst (Quartz (SiO₂), purple variety colored by trace iron and natural irradiation) — mineral

Tumbled amethyst

Quartz (SiO₂), purple variety colored by trace iron and natural irradiation

Chert (Common Opal/Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal/Jasper variety)

Microcrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Polished jasper pebble (Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities) — metamorphic

Polished jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Polished banded agate pendant (Agate, microcrystalline quartz (SiO₂), a chalcedony variety) — mineral

Polished banded agate pendant

Agate, microcrystalline quartz (SiO₂), a chalcedony variety

Likely banded agate pebble (Microcrystalline quartz (chalcedony), SiO₂) — mineral

Likely banded agate pebble

Microcrystalline quartz (chalcedony), SiO₂

Amethyst geode fragment (Quartz, SiO₂, colored by trace iron; purple quartz crystals lining a geode cavity) — mineral

Amethyst geode fragment

Quartz, SiO₂, colored by trace iron; purple quartz crystals lining a geode cavity

Chert (flint) fragment (Microcrystalline quartz (SiO₂), commonly called chert or flint) — sedimentary

Chert (flint) fragment

Microcrystalline quartz (SiO₂), commonly called chert or flint

Emerald (cut gemstone) (Beryl, Be₃Al₂Si₆O₁₈, colored green mainly by chromium and/or vanadium) — gemstone

Emerald (cut gemstone)

Beryl, Be₃Al₂Si₆O₁₈, colored green mainly by chromium and/or vanadium

Polished yellow-brown agate (likely carnelian or chalcedony) (Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration) — mineral

Polished yellow-brown agate (likely carnelian or chalcedony)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration

Likely polished agate beads (Agate, a banded variety of chalcedony (microcrystalline SiO₂); exact identification is uncertain from the image) — mineral

Likely polished agate beads

Agate, a banded variety of chalcedony (microcrystalline SiO₂); exact identification is uncertain from the image

Polished banded jasper (likely red-and-gray jasper) (Microcrystalline quartz (SiO₂), commonly termed jasper; exact variety cannot be confirmed from the photo) — metamorphic

Polished banded jasper (likely red-and-gray jasper)

Microcrystalline quartz (SiO₂), commonly termed jasper; exact variety cannot be confirmed from the photo

Tumbled amethyst (Amethyst, purple quartz (SiO₂)) — mineral

Tumbled amethyst

Amethyst, purple quartz (SiO₂)

Likely rough garnet-bearing rock (Possibly almandine garnet in a mica-rich metamorphic matrix; identification is uncertain from the image alone.) — metamorphic

Likely rough garnet-bearing rock

Possibly almandine garnet in a mica-rich metamorphic matrix; identification is uncertain from the image alone.

Amethyst beads (Amethyst, purple quartz (SiO₂)) — gemstone

Amethyst beads

Amethyst, purple quartz (SiO₂)

Possible aquamarine (beryl) crystal fragment (Beryl, Be₃Al₂Si₆O₁₈; green-blue color may indicate aquamarine) — mineral

Possible aquamarine (beryl) crystal fragment

Beryl, Be₃Al₂Si₆O₁₈; green-blue color may indicate aquamarine

Agate (SiO2) — mineral

Agate

SiO2

Polished banded jasper (likely red jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides; exact variety uncertain) — gemstone

Polished banded jasper (likely red jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides; exact variety uncertain

Orange chert or jasper fragment (Microcrystalline quartz (SiO₂), likely iron-oxide-bearing jasper) — mineral

Orange chert or jasper fragment

Microcrystalline quartz (SiO₂), likely iron-oxide-bearing jasper

Jasper (SiO2) — Mineral

Jasper

SiO2

Jasper or Agatized material (Microcrystalline Quartz (SiO2)) — sedimentary/metamorphic

Jasper or Agatized material

Microcrystalline Quartz (SiO2)

sedimentary/metamorphic