Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)

Eudialyte in Syenite (Dragon Blood Stone)

Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2

Basalt (Polished pebble)

Basalt (Aphanitic mafic volcanic rock)

Greenschist

Greenschist (Chlorite Schist)

Banded Calcite (often sold as 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

Amazonite

Potassium Feldspar (Microcline) - K(AlSi3O8)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Smoky Quartz and Feldspar Pegmatite

Granitic Pegmatite (chiefly SiO2 and KAlSi3O8)

Granite Pebble

Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)

Granite (weathered)

Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Amazonite

Microcline (KAlSi3O8) with lead impurities

Mahogany Obsidian

Volcanic Glass with Hematite inclusions (SiO2 + Fe2O3)

Iolite (Cordierite)

Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18

Diabase

Diabase (also known as Dolerite)

Quartzite

Quartzite (primarily SiO2)

Granite

Phaneritic Felsic Intrusive Igneous Rock

Muscovite Mica

Muscovite: KAl2(AlSi3O10)(OH)2

Blue Lace Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Rough Diamond

Diamond (Pure Carbon: C)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartzite (specifically an iron-stained or Carnelian-colored variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

Druzy Quartz on Host Rock

Silicon Dioxide (SiO2)

Rhyolitic Tuff (Breccia Type)

Rhyolitic Pyroclastic Rock (Mixed Silicates including Quartz, Feldspar, and Volcanic Glass)

Greenschist

Greenschist (Chlorite-actinolite schist)

Diorite (Spotted or Dalmatian Stone pattern)

Diorite

Dacite

Dacite (Intermediate volcanic rock)

Schist

Mica Schist (primarily Muscovite and Quartz)

Muscovite Mica

Muscovite / KAl2(AlSi3O10)(OH)2

Red Quartzite

Quartzite (SiO2 with iron oxide impurities)

Diorite

Diorite (an intrusive igneous rock)

Banded Agate (with possible Chalcedony layers)

Silicon dioxide (SiO2)

Moonstone

Orthoclase feldspar (KAlSi3O8)

Dragon Blood Jasper

Epidote with Pietersite or Red Jasper (Ca2Al2Fe3+[Si2O7][SiO4]O(OH))

Vesicular Basalt with Opal or Quartz

Vesicular Basalt (Amorphous SiO2.nH2O if Opal)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Basalt with Epidote Veining

Basalt (Mafic Extrusive Rock) with Ca2(Al,Fe)3(SiO4)3(OH)

Milky Quartz (or Vein Quartz)

Silicon Dioxide (SiO2)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Citrine

Crystalline Quartz (SiO2) with iron impurities

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Basalt (River Cobble)

Basalt (Mafic Extrusive Igneous Rock)