Igneous And Metamorphic Derivative (Weathered)

Browse igneous and metamorphic derivative (weathered) specimens identified by the Rock Identifier community.

Amphibolite (specifically Hornblende Schist/Gneiss)

Amphibole-rich Metamorphic Rock

metamorphic

Gneiss (Metamorphic Rock)

Gneiss

metamorphic

Quartz (Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Mineral

Iolite (Cordierite)

Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18

mineral

Red Garnet

Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

mineral

Dragon Blood Jasper

Epidote-containing Quartz Chalcedony (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))

metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

metamorphic

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Dragon Stone (Dragon Blood Jasper)

Epidote with Pietersite or Red Jasper inclusions (varied SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))

metamorphic

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

igneous

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

metamorphic

Gneiss

metamorphic

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

mineral

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

mineral

Rough Green Sapphire (Corundum)

Corundum (Al2O3 - Aluminum Oxide with trace elements)

mineral

Labradorite (Carved)

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

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Peacock Ore (Bornite or Chalcopyrite treated with acid)

Bornite (Cu5FeS4) or Acid-washed Chalcopyrite (CuFeS2)

mineral

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

mineral

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Chalcopyrite

Chalcopyrite (CuFeS2)

mineral

Blue Sapphire

Corundum (Al2O3) with iron and titanium impurities

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Potassium Feldspar

Orthoclase (KAlSi3O8)

mineral

White Quartz

Silicon Dioxide (SiO2)

mineral

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2

metamorphic

Sapphire

Corundum (Al2O3)

Mineral

Quartz

Silicon Dioxide (SiO2)

mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Serpentine

Serpentine group, including Antigorite, Lizardite, and Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

metamorphic

Pyrite

Iron Sulfide (FeS2)

mineral

Labradorite

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

mineral

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

mineral