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

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Red Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Carnelian (Carnelian (Silicon Dioxide - SiO2)) — mineral

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Satin Spar Selenite (Gypsum (CaSO4·2H2O)) — mineral

Satin Spar Selenite

Gypsum (CaSO4·2H2O)

Chert (Jasper-like) (SiO2 (Cryptocrystalline Quartz)) — Sedimentary

Chert (Jasper-like)

SiO2 (Cryptocrystalline Quartz)

Tumbled agate or chalcedony (probable) (Microcrystalline quartz, SiO₂) — gemstone

Tumbled agate or chalcedony (probable)

Microcrystalline quartz, SiO₂

Tumbled Black Stone (Unknown, possibly Obsidian, Onyx, or Tourmaline) — igneous or mineral

Tumbled Black Stone

Unknown, possibly Obsidian, Onyx, or Tourmaline

igneous or mineral

Carnelian Agate (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

Blue Chalcedony (Silicon Dioxide (SiO2)) — gemstone

Blue Chalcedony

Silicon Dioxide (SiO2)

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

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

Citrine Quartz carving

Silicon Dioxide (SiO2)

Rainbow Moonstone (White Labradorite (Feldspar variety)) — mineral

Rainbow Moonstone

White Labradorite (Feldspar variety)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Quartz Mineral (Silicon Dioxide (SiO2)) — mineral

Quartz Mineral

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Chert Pebble (Jasper variety)

Silicon Dioxide (SiO2)

Emerald (likely faceted gemstone) (Beryl, Be₃Al₂Si₆O₁₈; green color typically from chromium and/or vanadium) — gemstone

Emerald (likely faceted gemstone)

Beryl, Be₃Al₂Si₆O₁₈; green color typically from chromium and/or vanadium

Tumbled amethyst (Quartz, SiO₂; purple coloration typically from iron impurities and natural irradiation) — gemstone

Tumbled amethyst

Quartz, SiO₂; purple coloration typically from iron impurities and natural irradiation

Amethyst-bearing quartz (rough specimen) (Quartz, SiO₂; purple coloration is commonly caused by iron-related color centers) — mineral

Amethyst-bearing quartz (rough specimen)

Quartz, SiO₂; purple coloration is commonly caused by iron-related color centers

Dalmatian jasper (polished stone beads) (Commercial “Dalmatian jasper”; typically a feldspar-rich rock with dark aegirine or arfvedsonite inclusions, not true jasper) — metamorphic

Dalmatian jasper (polished stone beads)

Commercial “Dalmatian jasper”; typically a feldspar-rich rock with dark aegirine or arfvedsonite inclusions, not true jasper

Rough ruby-bearing corundum (identification uncertain) (Corundum (Al₂O₃), possibly ruby; the image alone cannot confirm ruby or distinguish it from other red-purple minerals.) — mineral

Rough ruby-bearing corundum (identification uncertain)

Corundum (Al₂O₃), possibly ruby; the image alone cannot confirm ruby or distinguish it from other red-purple minerals.

Polished rhyolite (likely rainforest jasper) (Rhyolite, a silica-rich volcanic rock; exact identification cannot be confirmed from the photo) — igneous

Polished rhyolite (likely rainforest jasper)

Rhyolite, a silica-rich volcanic rock; exact identification cannot be confirmed from the photo

Amethyst (Quartz, silicon dioxide (SiO₂), colored purple by trace iron and irradiation) — gemstone

Amethyst

Quartz, silicon dioxide (SiO₂), colored purple by trace iron and irradiation

Amethyst in quartz (Amethyst, purple quartz (SiO₂), with colorless/milky quartz) — mineral

Amethyst in quartz

Amethyst, purple quartz (SiO₂), with colorless/milky quartz

Tumbled amethyst (Quartz, SiO₂; purple coloration from trace iron and natural irradiation) — mineral

Tumbled amethyst

Quartz, SiO₂; purple coloration from trace iron and natural irradiation

Polished banded agate (likely carnelian agate) (Microcrystalline quartz, SiO₂ (chalcedony); iron-oxide coloring) — mineral

Polished banded agate (likely carnelian agate)

Microcrystalline quartz, SiO₂ (chalcedony); iron-oxide coloring

Amethyst (likely tumbled or polished) (Quartz, SiO₂; purple color commonly caused by trace iron and natural irradiation) — gemstone

Amethyst (likely tumbled or polished)

Quartz, SiO₂; purple color commonly caused by trace iron and natural irradiation

Jasper / Chert (tumbled/water-worn) (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper / Chert (tumbled/water-worn)

Microcrystalline Quartz (SiO2)

Jasper with Quartz (Silicon dioxide (SiO2)) — mineral

Jasper with Quartz

Silicon dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — mineral

Jasper

Silicon dioxide (SiO2)

Tumbled chalcedony or quartz fragment (Microcrystalline quartz, SiO₂ (probable chalcedony)) — mineral

Tumbled chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (probable chalcedony)

Agate (or Quartz with Agate banding) (Silicon dioxide (SiO2)) — Mineral

Agate (or Quartz with Agate banding)

Silicon dioxide (SiO2)