Sedimentary (If Limestone) Or Metamorphic (If Marble)

Carrara Marble

Recrystallized Calcite (CaCO3)

Connemara Marble

Calcitic Marble / Serpentinite composite

Blue-gray limestone or marble fragment

Calcite-rich carbonate rock; likely calcitic marble (CaCO₃), though limestone is possible

Pink calcite marble (probable)

Calcite, CaCO₃; recrystallized limestone (marble)

Lapis Lazuli

Lapis Lazuli (Metamorphic Rock containing Lazurite, Calcite, Pyrite, and Sodalite)

Lapis Lazuli

Lapis Lazuli (Complex aggregate containing Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Fossiliferous Limestone (Red Marble)

Bioclastic Limestone (CaCO3)

Blue Apatite

Ca5(PO4)3(F,Cl,OH)

Lapis Lazuli

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

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, Calcite, and Pyrite)

Green Calcite

Calcium Carbonate (CaCO3)

Blue Calcite

Calcium Carbonate (CaCO3)

Green Calcite

Calcium Carbonate (CaCO3)

Optical Calcite

Calcium Carbonate (CaCO3)

Carrara Marble

Metamorphosed Limestone (principally Calcium Carbonate, CaCO3)

Yellow Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite

Calcium Carbonate (CaCO3)

Quartzite on Matrix

Crystalline Silicon Dioxide (SiO2) within metamorphic matrix

Ruby (set in a gold pendant)

Ruby (Variety of Corundum, Al2O3)

Weathered limestone fragment

Calcite-rich limestone (CaCO₃), possibly chalky or fossiliferous limestone

Seashell Fragment (Aragonite/Calcite)

Calcium Carbonate (CaCO3) - Shell fragment

Black-and-white patterned stone, possibly zebra marble

Uncertain from the image; likely calcite marble with dark mineral veining or inclusions

Tumbled cream-colored stone, likely calcite or marble

Calcite (CaCO₃), possibly recrystallized as marble

Lapis Lazuli

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

Dark gray veined metamorphic rock

Likely marble or quartzite; exact identification requires hardness and acid tests

Honey Calcite

Calcite (CaCO3)

Small pale mineral fragment, likely quartz or calcite

Quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Orange Calcite (Cleavage Rhomb)

Calcite (Calcium Carbonate, CaCO3)

Clear calcite cleavage fragment

Calcite (calcium carbonate, CaCO₃)

Tumbled white-gray stone, likely calcite or marble

Calcite (CaCO₃), possibly fine-grained marble (recrystallized calcite)

Lapis Lazuli (in Matrix)

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

White Calcite (Dogtooth Spar or Crystalline Calcite)

Calcite (Calcium Carbonate, CaCO3)

Lapis Lazuli

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

Rounded limestone pebble

Micritic limestone, primarily calcite (CaCO₃)

Orange Calcite

Calcium Carbonate (CaCO3)

Blue calcite (likely)

Calcite, CaCO₃

Calcite (Optical or Clear Calcite)

Calcium Carbonate (CaCO3)

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Lapis Lazuli

Lapis Lazuli (Complex silicate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli (Carved)

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

Calcite

Calcium Carbonate (CaCO3)