Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)

Greenstone

Greenschist (containing chlorite, epidote, and actinolite)

Banded Agate (specifically Chalcedony nodule)

Agate (Silicon Dioxide, SiO2)

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Labradorite

Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8

Quartz (possibly milky quartz or quartz with inclusions)

SiO2 (Silicon Dioxide)

Basalt

Basalt (Mafic volcanic rock)

Carnelian

Carnelian Chalcedony (SiO2)

Fluorite (likely)

Calcium Fluoride (CaF2)

Porphyritic Rhyolite (Red Porphyry)

Porphyritic Rhyolite (Felsic volcanic rock)

Indian Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Smoky Quartz (with Hematite inclusions)

Silicon Dioxide (SiO2)

K2 Azurite Granite / K2 Stone

Granite (igneous rock) with Azurite inclusions (mineral)

Sapphire (likely blue synthetic sapphire or blue glass in a ring)

Corundum (Al₂O₃), specifically the blue variety due to trace amounts of iron and titanium impurities. If synthetic, it would still be Al₂O₃.

Granite River Pebble

Phaneritic Granite (primarily Quartz, Feldspar, and Mica)

Basaltic Scoria

Scoria (Vesicular Basalt/Andesite)

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Carnelian Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Granite Gneiss

High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)

Yooperlite (Sodalite-bearing Syenite)

Sodalite-rich Syenite (Na8(Al6Si6O24)Cl2)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Blue Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Yellow Quartz (Citrine or Quartzite Pebble)

Silicon Dioxide (SiO2)

Greenstone (Epidote/Chlorite-rich Metabasalt)

Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))

Carnelian Agate/Jasper blend

Silicon Dioxide (SiO2) - variety of Chalcedony

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Kyanite

Kyanite (Al2SiO5)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Quartz Pebble (Sea Glass-like Quartz)

Quartz (Silicon Dioxide - SiO2)

Soapstone

Steatite (primarily composed of Talc, Mg₃Si₄O₁₀(OH)₂)

Biotite (Black Mica)

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

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide); NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

Blue Calcite

Calcium Carbonate (CaCO3)

Pink Opal

Hydrated silicon dioxide (SiO2·nH2O) with inclusions

Greenstone with Quartz Veining

Epidiorite or Metabasalt with SiO2 (Quartz) veins

Yellow Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz Crystal

Quartz (SiO₂)