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

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

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

Clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Quartz crystal cluster (Quartz (silicon dioxide, SiO₂), likely included or coated with chlorite and iron-oxide minerals) — mineral

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂), likely included or coated with chlorite and iron-oxide minerals

Pyrite in Matrix (Iron Disulfide (FeS2)) — mineral

Pyrite in Matrix

Iron Disulfide (FeS2)

Quartz Druze on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

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

Smoky quartz crystal

Quartz, silicon dioxide (SiO₂), smoky variety

Druzy quartz geode (Microcrystalline quartz (SiO₂), commonly lining a volcanic geode cavity) — mineral

Druzy quartz geode

Microcrystalline quartz (SiO₂), commonly lining a volcanic geode cavity

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Obsidian (Volcanic Glass (comprised primarily of SiO2)) — Igneous

Obsidian

Volcanic Glass (comprised primarily of SiO2)

Pyromorphite on Epidote (Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]) — mineral

Pyromorphite on Epidote

Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]

Amethyst crystal cluster (Quartz, purple variety (SiO₂)) — mineral

Amethyst crystal cluster

Quartz, purple variety (SiO₂)

Honey-brown calcite crystal cluster (Calcite (CaCO₃), likely dogtooth or scalenohedral calcite) — mineral

Honey-brown calcite crystal cluster

Calcite (CaCO₃), likely dogtooth or scalenohedral calcite

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

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

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

Quartz Crystal (Amethyst)

Silicon Dioxide (SiO2)

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

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Black tourmaline (schorl) (Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) — mineral

Black tourmaline (schorl)

Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Raw aquamarine (blue-green beryl) (Beryl, Be₃Al₂Si₆O₁₈; blue-green color from iron impurities) — mineral

Raw aquamarine (blue-green beryl)

Beryl, Be₃Al₂Si₆O₁₈; blue-green color from iron impurities

Rose quartz (Quartz (SiO₂), pink variety; trigonal crystal system) — mineral

Rose quartz

Quartz (SiO₂), pink variety; trigonal crystal system

Amethyst (Quartz (SiO₂), purple variety; trigonal crystal system) — mineral

Amethyst

Quartz (SiO₂), purple variety; trigonal crystal system

Rose quartz cabochon (Quartz, SiO₂ (pink variety; trigonal crystal system)) — mineral

Rose quartz cabochon

Quartz, SiO₂ (pink variety; trigonal crystal system)

Rose quartz cabochon (Quartz, SiO₂ (rose quartz; trigonal crystal system)) — gemstone

Rose quartz cabochon

Quartz, SiO₂ (rose quartz; trigonal crystal system)

Raw quartz (milky quartz), possibly iron-stained (Quartz, silicon dioxide (SiO₂), trigonal crystal system) — mineral

Raw quartz (milky quartz), possibly iron-stained

Quartz, silicon dioxide (SiO₂), trigonal crystal system

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

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

$Tumbled quartz pebble (Quartz (SiO₂), likely milky or fractured rock crystal) — mineral$

Tumbled quartz pebble

Quartz (SiO₂), likely milky or fractured rock crystal

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst (Quartz (Silicon Dioxide) SiO2 with iron impurities) — mineral

Amethyst

Quartz (Silicon Dioxide) SiO2 with iron impurities

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Likely rough smoky quartz (Quartz, silicon dioxide (SiO₂)) — mineral

Likely rough smoky quartz

Quartz, silicon dioxide (SiO₂)

Amethyst crystal cluster (Quartz (SiO₂), purple variety colored mainly by iron-related defects and irradiation) — gemstone

Amethyst crystal cluster

Quartz (SiO₂), purple variety colored mainly by iron-related defects and irradiation

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

Clear quartz crystal pendant

Quartz (silicon dioxide, SiO₂)

Amethyst (rough crystal fragment) (Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related impurities) — mineral

Amethyst (rough crystal fragment)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related impurities

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

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

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Basalt with Plagioclase Phenocryst (Porphyritic Basalt) — igneous

Basalt with Plagioclase Phenocryst

Porphyritic Basalt

Herkimer Diamond (Quartz (Silicon Dioxide, SiO2)) — mineral

Herkimer Diamond

Quartz (Silicon Dioxide, SiO2)

Angel Aura Quartz (Treated Clear Quartz) (Silicon Dioxide (SiO2) coated with Vaporized Silver and Platinum) — mineral

Angel Aura Quartz (Treated Clear Quartz)

Silicon Dioxide (SiO2) coated with Vaporized Silver and Platinum