Rock Identifier

Category

Crystal

Browse crystal specimens identified by the Rock Identifier community.

Rose Quartz (Silicon Dioxide with traces of titanium, iron, or manganese (SiO2)) — mineral

Rose Quartz

Silicon Dioxide with traces of titanium, iron, or manganese (SiO2)

Citrine (Heat-treated Amethyst) (Citrine Quartz (SiO2)) — Mineral (Tectosilicate)

Citrine (Heat-treated Amethyst)

Citrine Quartz (SiO2)

Mineral (Tectosilicate)

Yellow Quartzite (Orange Quartzite) (Silicon Dioxide (SiO2) with iron oxide staining) — metamorphic

Yellow Quartzite (Orange Quartzite)

Silicon Dioxide (SiO2) with iron oxide staining

Epidote (Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))) — mineral

Epidote

Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Diamond in Kimberlite (Kimberlite Matrix with Carbon (Diamond)) — igneous

Diamond in Kimberlite

Kimberlite Matrix with Carbon (Diamond)

Obsidian (Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)) — igneous

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Quartz Druzy on Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Druzy on Geode Fragment

Silicon Dioxide (SiO2)

Obsidian (Volcanic glass (no mineral formula due to amorphous structure, mostly SiO2)) — igneous

Obsidian

Volcanic glass (no mineral formula due to amorphous structure, mostly SiO2)

Amethyst (Quartz (SiO2) with trace iron impurities) — Mineral

Amethyst

Quartz (SiO2) with trace iron impurities

Porphyritic Basalt or Andesite (Porphyritic Basalt / Andesite) — Igneous

Porphyritic Basalt or Andesite

Porphyritic Basalt / Andesite

Granite (Micro-specimen) (Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite (Micro-specimen)

Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite (Granite (comprised primarily of Quartz (SiO2), Feldspar (KAlSi3O8), and Mica (KAl2(AlSi3O10)(OH)2))) — igneous

Granite

Granite (comprised primarily of Quartz (SiO2), Feldspar (KAlSi3O8), and Mica (KAl2(AlSi3O10)(OH)2))

Vanadinite (Lead Chlorovanadate - Pb5(VO4)3Cl) — mineral

Vanadinite

Lead Chlorovanadate - Pb5(VO4)3Cl

Pallasite Meteorite (Pallasite (ST-class)) — mineral

Pallasite Meteorite

Pallasite (ST-class)

Amethyst (Geode/Druzy) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Geode/Druzy)

Silicon Dioxide (SiO2) with iron impurities

Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Porphyritic Andesite (often called Chinese Writing Stone) (Porphyritic Basaltic Andesite with Feldspar Phenocrysts) — igneous

Porphyritic Andesite (often called Chinese Writing Stone)

Porphyritic Basaltic Andesite with Feldspar Phenocrysts

Chinese Writing Stone (Porphyritic Basalt or Porphyritic Andesite) — igneous

Chinese Writing Stone

Porphyritic Basalt or Porphyritic Andesite

Pyrite on Quartz (Fool's Gold in Quartz) (Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)) — mineral

Pyrite on Quartz (Fool's Gold in Quartz)

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

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

Pyrite (Iron Pyrite)

Iron Disulfide (FeS2)

Feldspar-rich Pegmatite (Granitic Pegmatite (principally KAlSi3O8)) — igneous

Feldspar-rich Pegmatite

Granitic Pegmatite (principally KAlSi3O8)

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

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Okenite (in Zeolite matrix) (Okenite (CaSi2O5 · 2H2O)) — mineral

Okenite (in Zeolite matrix)

Okenite (CaSi2O5 · 2H2O)

Blue-dyed Quartz Druzy (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Blue-dyed Quartz Druzy

Silicon Dioxide (SiO2) with artificial pigment

Quartz Geode (with possible Manganese or Goethite coating) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (with possible Manganese or Goethite coating)

Silicon Dioxide (SiO2)

Amethyst (Digital/Conceptual Representation) (Amethyst (Silicon Dioxide with iron impurities, SiO2)) — mineral

Amethyst (Digital/Conceptual Representation)

Amethyst (Silicon Dioxide with iron impurities, SiO2)

Celestite (Celestine) (Strontium Sulfate (SrSO4)) — mineral

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz (specifically Clear and Rose Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Clear and Rose Quartz)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine Quartzite) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Pink Dyed Agate (Silicon Dioxide (SiO2) - Variety Agate) — mineral

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Unable to Identify (Image Obscured) — Indeterminate

Unable to Identify (Image Obscured)

Unable to identify - Image contains non-geological items — N/A

Unable to identify - Image contains non-geological items

Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Obsidian (Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)) — Igneous

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Limonite-pseudomorph after Pyrite (Prophecy Stone) (Goethite and Limonite secondary minerals (FeO(OH)·nH2O) replacing Pyrite (FeS2)) — mineral

Limonite-pseudomorph after Pyrite (Prophecy Stone)

Goethite and Limonite secondary minerals (FeO(OH)·nH2O) replacing Pyrite (FeS2)

Pegmatite (likely Granitic Pegmatite) (Pegmatite (a coarse-grained igneous rock, often with granitic composition)) — igneous

Pegmatite (likely Granitic Pegmatite)

Pegmatite (a coarse-grained igneous rock, often with granitic composition)

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

Druzzy Quartz on Matrix

Silicon Dioxide (SiO2)