Marble

Quartzite

Quartzite (SiO2)

White Onyx (Marble Onyx)

Calcite (CaCO3) - Banded Calcium Carbonate

Quartzite

Quartzite (primarily SiO2)

Diorite

Diorite (Intermediate intrusive igneous rock)

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Sapphire

Corundum (Al2O3)

Lapis Lazuli

Lapis lazuli (a metamorphic rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Aragonite (Onyx Marble)

Aragonite / Calcium Carbonate (CaCO3)

Moqui Marble (Concretion)

Iron oxide concretion (Goethite/Hematite and Sandstone)

Crinoid Fossil Marble

Crinoidal Limestone / Phylum Echinodermata

Aragonite (Onyx Marble)

Calcium Carbonate (CaCO3), Orthorhombic crystal system

Moqui Marble (Concretion)

Iron Oxide Concretion (Hematite-cemented Sandstone)

Banded Onyx (Mexican Onyx / Travertine)

Calcite (CaCO3) - Banded Travertine

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Optical Calcite

Calcium Carbonate (CaCO3)

Mica Schist

Medium-grade regional metamorphic rock (composition varies)

Amazonite

Microcline (KAlSi3O8) with lead inclusions

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Ruby (Pink to Red Corundum)

Al2O3 (Corundum with Chromium impurities)

Lapis Lazuli (Low Grade)

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)

Lapis Lazuli

Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli

Na6Ca2(Al6Si6O24)(SO4,S,Cl,OH)2 (Lazurite-dominated rock)

Blue Calcite

Calcium Carbonate (CaCO3)

Blue Sapphire (Raw/Tumbled Corundum)

Corundum (Aluminum Oxide, Al2O3 with Fe/Ti traces)

Amber (Burmite)

Fossilized tree resin (Succinite variant)

Orange Calcite (Dogtooth/Cluster)

Calcium Carbonate (CaCO3)

Quartzite

Quartzite (SiO2)

Blue Quartzite

Quartzite with inclusions (SiO2)

Blue Sapphire (Raw)

Corundum (Al2O3)

Lapis Lazuli

Lapis Lazuli (Aggregate primarily of Lazurite: (Na,Ca)8(AlSiO4)6(S,SO4,Cl,1-2) with Calcite and Pyrite)

Bicolor Tanzanite

Zoisite (Ca2Al3(SiO4)3(OH))

Ruby

Corundum (Al2O3)

Rhodonite

Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3

Green glass sphere/marble

Soda-lime glass (primarily SiO2, Na2O, CaO)

Orange Calcite

Calcium Carbonate (CaCO3)

Green Quartzite

Quartzite (primarily SiO2 with chromium-rich mica/fuchsite impurities)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Howlite

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Quartzite

Quartzite (primarily SiO2)