Marble

Quartzite

Quartzite (primarily SiO2)

Sandstone (lithic wacke/arenite)

Clastic sedimentary rock (primarily SiO2)

Lapis Lazuli

Lapis lazuli (Complex silicate mixture including Lazurite, Calcite, and Pyrite)

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide with Iron and Titanium impurities)

Lapis Lazuli

Lapis Lazuli (Complex aggregate of Lazurite, Calcite, and Pyrite)

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Quartzite

Quartzite (primarily SiO2)

Zebra Jasper (Zebra Stone)

Silicon Dioxide (SiO2) with iron oxide and manganese inclusions

Blue Calcite

Calcium Carbonate (CaCO3)

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Lapis Lazuli

Lapis Lazuli (A metamorphic rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, along with Calcite and Pyrite)

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Quartzite

Quartzite (SiO2)

Lapis Lazuli (in Matrix)

Na8[Al6Si6O24]S2 (Lazurite as the primary component)

Lapis Lazuli (Raw Ore)

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

Lapis Lazuli

Sodium aluminum silicate with sulfur (main component: Lazurite [(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2])

Ruby (Raw/Rough)

Corundum (Al2O3 with Chromium trace)

Pink Quartzite

Quartzite (primarily SiO2 with trace impurities of iron oxides)

Quartzite

Quartzite (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)

Lapis Lazuli

Lazurite (primary mineral component), (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Quartzite (Orthoquartzite)

Quartzite (SiO2)

Quartzite (or Milky Quartz pebble)

Quartzite (primarily Silicon Dioxide, SiO2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Calcite

Calcite (CaCO3)

Serpentinite

Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)

Calcite

Calcite (CaCO3)

Lapis Lazuli

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

Lapis Lazuli

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

Lapis Lazuli

Lapis Lazuli (Metamorphic rock containing lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, calcite, and pyrite)

Brown Jasper

Silicon Dioxide (SiO2)

Blue Sapphire

Corundum (Al2O3)

Crinoid Marble (Fossilized Limestone)

Crinoidal Limestone (comprising Calcite/Aragonite CaCO3)

Quartzite (River Cobble)

Quartzite (Metamorphosed Quartz Sandstone, SiO2)

Blue Sapphire (Ceylon)

Corundum (Al2O3) with traces of Iron and Titanium

Lapis Lazuli

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

Fluorite (left), Sodalite (middle), Dumortierite/Tumbled Quartzite (right)

Calcium Fluoride (CaF2), Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2), Aluminum Borosilicate (Al7(BO3)(SiO4)3O3)

Zebra Jasper

Silicon Dioxide (SiO2) - Macro-crystalline Quartz/Chert with impurities

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])

Ruby

Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)