Rock Identifier

Category

Granite

Browse granite specimens identified by the Rock Identifier community.

Diabase (Greenstone) (Diabase or Dolerite) — igneous

Diabase (Greenstone)

Diabase or Dolerite

Porphyritic Basalt (Peanut Obsidian/Star Galaxy-style) (Porphyritic Basalt (Silica-rich Volcanic Rock)) — igneous

Porphyritic Basalt (Peanut Obsidian/Star Galaxy-style)

Porphyritic Basalt (Silica-rich Volcanic Rock)

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Hematite/Goethite inclusions) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Smoky Quartz (SiO2 (Silicon Dioxide)) — mineral

Smoky Quartz

SiO2 (Silicon Dioxide)

Granitic Pegmatite with Biotite (Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)) — igneous

Granitic Pegmatite with Biotite

Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Amethyst (Amethyst (Silicon Dioxide with Iron impurities, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide with Iron impurities, SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Biotite Mica (Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)) — mineral

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)

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

Quartz

Quartz (Silicon Dioxide, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Amazonite (K(AlSi3O8) - Potassium Feldspar (Microcline variant)) — mineral

Amazonite

K(AlSi3O8) - Potassium Feldspar (Microcline variant)

Black Tourmaline (Schorl) (Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6Si6O18(BO3)3(OH)3OH) — mineral

Black Tourmaline (Schorl)

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6Si6O18(BO3)3(OH)3OH

Biotite / Black Mica (Biotite K(Mg,Fe)3AlSi3O10(F,OH)2) — mineral

Biotite / Black Mica

Biotite K(Mg,Fe)3AlSi3O10(F,OH)2

Smoky Quartz (Smoky Quartz (Silicon Dioxide, SiO2)) — mineral

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

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

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

Magnetite Sand (Black Sand) (Magnetite (Fe3O4)) — mineral

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)

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

Quartz (Crystal Cluster)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Zircon (Zirconium Silicate (ZrSiO₄)) — mineral

Zircon

Zirconium Silicate (ZrSiO₄)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Diorite (Salt and Pepper Rock) (Phaneritic Plutonic Diorite; chemical composition roughly 52-63% silica (SiO2)) — igneous

Diorite (Salt and Pepper Rock)

Phaneritic Plutonic Diorite; chemical composition roughly 52-63% silica (SiO2)

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

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Orthoclase Feldspar (Orthoclase (KAlSi3O8)) — mineral

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Pegmatite (Granite Pegmatite) (Intrusive Igneous Rock (Granite Pegmatite)) — igneous

Pegmatite (Granite Pegmatite)

Intrusive Igneous Rock (Granite Pegmatite)

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Howlite and Purpurite druzy (Calcium Borosilicate Hydroxide (Howlite) and Manganese Phosphate (Purpurite)) — mineral

Howlite and Purpurite druzy

Calcium Borosilicate Hydroxide (Howlite) and Manganese Phosphate (Purpurite)

Diabase (also known as Dolerite) (Diabase) — igneous

Diabase (also known as Dolerite)

Diabase

Quartzite (river pebble) and Gabbro (crushed rock) (Quartzite (metamorphosed Quartz Sandstone, SiO2) and Gabbro (Plagioclase-Clinopyroxene rock)) — Metamorphic and Igneous

Quartzite (river pebble) and Gabbro (crushed rock)

Quartzite (metamorphosed Quartz Sandstone, SiO2) and Gabbro (Plagioclase-Clinopyroxene rock)

Metamorphic and Igneous

Banded Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss (High-Grade Metamorphic Rock) (Gneiss (primarily composed of Quartz, Feldspar, and Mica/Amphiboles)) — metamorphic

Gneiss (High-Grade Metamorphic Rock)

Gneiss (primarily composed of Quartz, Feldspar, and Mica/Amphiboles)

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Granitic Pegmatite (Coarse-grained Granite (KAlSi3O8 + SiO2)) — igneous

Granitic Pegmatite

Coarse-grained Granite (KAlSi3O8 + SiO2)

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Granitic Pegmatite (Granite Pegmatite (coarse-grained intrusive igneous rock)) — igneous

Granitic Pegmatite

Granite Pegmatite (coarse-grained intrusive igneous rock)

Rhyolite (Rhyolite (High-silica volcanic rock)) — igneous

Rhyolite

Rhyolite (High-silica volcanic rock)

Diorite (Diorite) — igneous

Diorite

Diorite

Artificial Rock Face (Faux Rock) (Glass Fiber Reinforced Concrete (GFRC)) — man-made/construction material

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

man-made/construction material

Granite (Light-colored quartz/feldspar variety) (Granite (composed primarily of Quartz SiO2 and Feldspar KAlSi3O8)) — igneous

Granite (Light-colored quartz/feldspar variety)

Granite (composed primarily of Quartz SiO2 and Feldspar KAlSi3O8)

Smoky Quartz Geode Slice (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz Geode Slice

Silicon Dioxide (SiO2)