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

Aquamarine (Beryl) (Beryllium aluminum silicate (Be3Al2Si6O18)) — mineral

Aquamarine (Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Emerald In Matrix (Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium) — mineral

Emerald In Matrix

Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Emerald (Tumbled Beryl) (Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald (Tumbled Beryl)

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities

Smoky quartz crystal (Quartz (SiO₂), likely smoky variety) — mineral

Smoky quartz crystal

Quartz (SiO₂), likely smoky variety

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

Tumbled quartz crystal

Quartz (silicon dioxide, SiO₂)

Amethyst quartz crystal (Quartz, SiO₂, purple variety (amethyst)) — mineral

Amethyst quartz crystal

Quartz, SiO₂, purple variety (amethyst)

Smoky quartz crystal fragment (Quartz (SiO₂), smoky variety) — mineral

Smoky quartz crystal fragment

Quartz (SiO₂), smoky variety

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

Clear quartz crystal (tentative)

Quartz, silicon dioxide (SiO₂)

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

Clear quartz crystal sphere

Quartz (silicon dioxide, SiO₂)

Amethyst-bearing geode fragment (Quartz (SiO₂), with purple amethyst crystals; exact identification is uncertain from the image) — mineral

Amethyst-bearing geode fragment

Quartz (SiO₂), with purple amethyst crystals; exact identification is uncertain from the image

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

Clear quartz fragment (rock crystal)

Quartz, silicon dioxide (SiO₂)

Pallasite Meteorite (Sliced and Polished) (Pallasite (Iron-Nickel Matrix with Olivine crystals)) — mineral

Pallasite Meteorite (Sliced and Polished)

Pallasite (Iron-Nickel Matrix with Olivine crystals)

Smoky quartz crystal (tentative) (Quartz, silicon dioxide (SiO₂), likely smoky variety) — mineral

Smoky quartz crystal (tentative)

Quartz, silicon dioxide (SiO₂), likely smoky variety

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

Likely quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

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

Rock crystal quartz fragment

Quartz (silicon dioxide, SiO₂)

Clear Quartz (Cut/Faceted Gemstone) (Silicon Dioxide (SiO2)) — gemstone

Clear Quartz (Cut/Faceted Gemstone)

Silicon Dioxide (SiO2)

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

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Aquamarine (Rough) (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine (Rough)

Beryl (Be3Al2Si6O18)

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

Tumbled milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Iridescent bismuth crystal (Bismuth (Bi), artificially crystallized) — mineral

Iridescent bismuth crystal

Bismuth (Bi), artificially crystallized

Likely quartz crystal (Quartz (SiO₂), possibly milky or iron-stained quartz) — mineral

Likely quartz crystal

Quartz (SiO₂), possibly milky or iron-stained quartz

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

Milky quartz crystal

Quartz (silicon dioxide, SiO₂)

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

Quartz crystal (likely milky or clear quartz)

Quartz, silicon dioxide (SiO₂)

Emerald in Matrix (Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities

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

Clear quartz crystal beads

Quartz (silicon dioxide, SiO₂)

Likely smoky quartz crystal (Quartz (SiO₂), possibly smoky quartz) — mineral

Likely smoky quartz crystal

Quartz (SiO₂), possibly smoky quartz

Goethite pseudomorph after Pyrite (Goethite (FeO(OH)) pseudomorph after Pyrite (FeS2)) — mineral

Goethite pseudomorph after Pyrite

Goethite (FeO(OH)) pseudomorph after Pyrite (FeS2)

Aquamarine (Beryl (Be3Al2Si6O18)) — gemstone

Aquamarine

Beryl (Be3Al2Si6O18)

Aquamarine (Beryl (Be3Al2Si6O18 with iron impurities)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Emerald In Matrix (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald In Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Emerald In Matrix (Quartz/Calcite) (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald In Matrix (Quartz/Calcite)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Smoky quartz crystal fragment (Quartz (SiO₂), smoky variety) — mineral

Smoky quartz crystal fragment

Quartz (SiO₂), smoky variety

Quartz crystal with associated mica or feldspar (Quartz (SiO₂), with possible muscovite mica and feldspar inclusions) — mineral

Quartz crystal with associated mica or feldspar

Quartz (SiO₂), with possible muscovite mica and feldspar inclusions

Clear quartz crystal (Quartz (SiO₂), likely a small hexagonal prismatic crystal) — mineral

Clear quartz crystal

Quartz (SiO₂), likely a small hexagonal prismatic crystal

Selenite (gypsum) crystal (Gypsum, CaSO₄·2H₂O; transparent-to-translucent variety known as selenite) — mineral

Selenite (gypsum) crystal

Gypsum, CaSO₄·2H₂O; transparent-to-translucent variety known as selenite

Smoky quartz crystal (Quartz, silicon dioxide (SiO₂), brown variety colored by irradiation-related defects) — mineral

Smoky quartz crystal

Quartz, silicon dioxide (SiO₂), brown variety colored by irradiation-related defects

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

Selenite (gypsum crystal)

Gypsum, CaSO₄·2H₂O; variety selenite

Amethyst crystal fragment (Quartz, SiO₂; purple variety colored by trace iron and irradiation) — mineral

Amethyst crystal fragment

Quartz, SiO₂; purple variety colored by trace iron and irradiation

Smoky quartz crystal (Quartz, silicon dioxide (SiO₂), likely smoky variety) — mineral

Smoky quartz crystal

Quartz, silicon dioxide (SiO₂), likely smoky variety

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

Milky quartz crystal

Quartz, silicon dioxide (SiO₂)