Rock Identifier

Category

Crystal

Browse crystal specimens identified by the Rock Identifier community.

Learn about Crystal in the encyclopedia

Amethyst

Ametrine

Apophyllite

Aquamarine Crystal

Aquamarine Crystal

Aventurine

Blue Quartz

Brandberg Amethyst

Brandberg Amethyst

Cactus Quartz

Cathedral Quartz

Cathedral Quartz

Chevron Amethyst

Chevron Amethyst

Clear Quartz

Danburite

Limestone with Calcite Crystals (Sedimentary Rock containing Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Crystals

Sedimentary Rock containing Calcium Carbonate (CaCO3)

Limestone with Calcite Crystals (Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Crystals

Calcium Carbonate (CaCO3)

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

Quartz crystal (likely clear quartz)

Quartz, silicon dioxide (SiO₂)

Phantom Quartz with Chlorite and Hematite inclusions (Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)) — mineral

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Pale green fluorite crystal (Fluorite (calcium fluoride, CaF₂)) — mineral

Pale green fluorite crystal

Fluorite (calcium fluoride, CaF₂)

Likely fluorite crystal fragment (Fluorite (calcium fluoride, CaF₂)) — mineral

Likely fluorite crystal fragment

Fluorite (calcium fluoride, CaF₂)

Quartz crystal fragment with iron-oxide inclusions (Quartz, SiO₂; inclusions likely limonite/goethite or possibly mica) — mineral

Quartz crystal fragment with iron-oxide inclusions

Quartz, SiO₂; inclusions likely limonite/goethite or possibly mica

Black tourmaline (schorl) crystal fragments (Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) — mineral

Black tourmaline (schorl) crystal fragments

Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Emerald in matrix (possible) (Green beryl, Be₃Al₂Si₆O₁₈, in a pale pegmatitic or metamorphic host rock; identification is tentative from the image) — mineral

Emerald in matrix (possible)

Green beryl, Be₃Al₂Si₆O₁₈, in a pale pegmatitic or metamorphic host rock; identification is tentative from the image

Agate Geode (Banded Chalcedony (Silicon Dioxide, SiO2) with Quartz crystals) — mineral

Agate Geode

Banded Chalcedony (Silicon Dioxide, SiO2) with Quartz crystals

Quartz Crystal Cluster (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Emerald in Matrix (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — gemstone

Emerald in Matrix

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Aquamarine (Beryl (Be₃Al₂Si‑₆O₁‑₈)) — mineral

Aquamarine

Beryl (Be₃Al₂Si‑₆O₁‑₈)

Emerald in Matrix (Emerald (Beryllium Aluminum Silicate - Be3Al2(SiO3)6)) — mineral

Emerald in Matrix

Emerald (Beryllium Aluminum Silicate - Be3Al2(SiO3)6)

Emerald in Matrix (Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Tumbled quartz or pale agate pebble (Quartz (SiO₂), possibly microcrystalline chalcedony) — mineral

Tumbled quartz or pale agate pebble

Quartz (SiO₂), possibly microcrystalline chalcedony

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Green beryl (possibly emerald) with dark matrix (Beryl, Be₃Al₂Si₆O₁₈; green variety colored mainly by chromium or vanadium) — mineral

Green beryl (possibly emerald) with dark matrix

Beryl, Be₃Al₂Si₆O₁₈; green variety colored mainly by chromium or vanadium

Blue quartz crystal (likely synthetic or coated quartz) (Quartz, silicon dioxide (SiO₂); possible aqua-aura quartz) — mineral

Blue quartz crystal (likely synthetic or coated quartz)

Quartz, silicon dioxide (SiO₂); possible aqua-aura quartz

Clear quartz crystal (Quartz (silicon dioxide, SiO₂)) — mineral

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Rutilated quartz crystal (Quartz, silicon dioxide (SiO₂), containing rutile inclusions (TiO₂)) — mineral

Rutilated quartz crystal

Quartz, silicon dioxide (SiO₂), containing rutile inclusions (TiO₂)

Green fluorite crystal (Fluorite (calcium fluoride, CaF₂)) — mineral

Green fluorite crystal

Fluorite (calcium fluoride, CaF₂)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz crystal, likely iron-stained quartz (Quartz (SiO₂)) — mineral

Quartz crystal, likely iron-stained quartz

Quartz (SiO₂)

Rock crystal (clear quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Rock crystal (clear quartz)

Quartz, silicon dioxide (SiO₂)

Quartz Crystal Cluster (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Selenite (gypsum crystal) (Gypsum, CaSO₄·2H₂O; monoclinic crystal) — mineral

Selenite (gypsum crystal)

Gypsum, CaSO₄·2H₂O; monoclinic crystal

Quartz-rich crystal cluster (likely milky quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Quartz-rich crystal cluster (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Tiger's Eye (specifically Hawk's Eye or Multicolored Tiger's Iron) (Silicon Dioxide with Crocidolite inclusions (SiO2)) — mineral

Tiger's Eye (specifically Hawk's Eye or Multicolored Tiger's Iron)

Silicon Dioxide with Crocidolite inclusions (SiO2)

Amethyst Cluster Pendant (Silicon Dioxide (SiO2) - Quartz variety Amethyst) — gemstone

Amethyst Cluster Pendant

Silicon Dioxide (SiO2) - Quartz variety Amethyst

Blue Quartz (Silicon Dioxide (SiO2) with inclusions) — mineral

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Clear Quartz Crystal on Matrix (SiO2 (Silicon Dioxide)) — mineral

Clear Quartz Crystal on Matrix

SiO2 (Silicon Dioxide)

Emerald in Matrix (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — gemstone

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Aquamarine (Beryl (Be3Al2Si6O18)) — gemstone

Aquamarine

Beryl (Be3Al2Si6O18)

Rock Crystal Quartz (Quartz (SiO₂)) — Mineral

Rock Crystal Quartz

Quartz (SiO₂)

Emerald in Matrix (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — mineral

Emerald in Matrix

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Aquamarine (Beryl (Be3Al2Si6O18)) — gemstone

Aquamarine

Beryl (Be3Al2Si6O18)

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Small pale green crystal, likely beryl (aquamarine) (Possibly beryl, Be₃Al₂Si₆O₁₈; identification is uncertain from the image) — mineral

Small pale green crystal, likely beryl (aquamarine)

Possibly beryl, Be₃Al₂Si₆O₁₈; identification is uncertain from the image

Moss Agate (Silicon Dioxide (Chalcedony variety)) — mineral

Moss Agate

Silicon Dioxide (Chalcedony variety)