Marble

Lapis Lazuli

Complex metamorphic rock primarily composed of Lazurite ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2), Calcite, and Pyrite

Ruby

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Ruby (Pinkish-Red)

Corundum (Al2O3 with Chromium trace)

Blue Calcite

Calcium Carbonate (CaCO3)

Pink Sapphire

Corundum (Al2O3) with Chromium/Iron/Titanium trace impurities

Serpentine

Serpentinite (group of minerals: (Mg,Fe,Ni,Al)3Si2O5(OH)4)

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)

Lapis Lazuli

Complex mixture containing Lazurite ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2), Calcite, and Pyrite

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Ruby

Corundum (Al2O3) with Chromium traces

Chert Concretion (with typical hematite/limonite staining)

Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)

Pink Quartzite

Quartzite (primarily SiO2)

Granite

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

Banded Calcite (often sold as 'Ocean Jasper' or 'Caribbean Calcite' variant)

Calcium Carbonate (CaCO3) with potential Aragonite inclusions

Quartzite pebble

Quartzite (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Diorite

Diorite (Intermediate intrusive igneous rock)

Quartzite

Quartzite (SiO2 silicon dioxide)

Orange Calcite

Calcium Carbonate (CaCO3)

Corundum (Ruby variety)

Aluminium oxide (Al2O3)

Pink Sapphire

Corundum (Al2O3 with Chromium/Titanium/Iron traces)

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)

Lapis Lazuli

Complex mixture of minerals (lazurite, calcite, pyrite, and sodalite); (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Lapis Lazuli

Lapis lazuli (primary component: Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Green Tourmaline

Verdelite (Silicate mineral); Na(Li,Al)3Al6(BO3)3Si6O18(OH)4

Ruby

Corundum (Al2O3 with Chromium impurities)

Graphite

Graphite (Native Carbon, C)

Lapis Lazuli

Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

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)

Sandstone Concretion

Clastic Sedimentary Rock (primarily SiO2 with mineral cement)

Mica Schist

Medium-grade regional metamorphic rock (composition varies)

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Amazonite

Potassium Feldspar (KAlSi3O8), specifically Microcline

Yellow Quartzite (River Pebble)

Quartzite (primarily Silicon Dioxide, SiO2)

Granite

Granite (Phaneritic igneous rock)

Red Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)