Sedimentary (If Limestone) Or Metamorphic (If Marble)

Green Calcite

Calcium Carbonate (CaCO3)

Polished banded limestone or marble pebble

Calcite-rich carbonate rock; likely banded marble (recrystallized limestone)

Orange Calcite

Calcium Carbonate (CaCO3)

Rounded limestone pebble

Limestone, primarily calcite (CaCO₃), possibly micritic or fossiliferous

Map Jasper (Grey Picasso Jasper)

Silicon Dioxide (SiO2) with impurities

White quartz-rich rock, possibly marble or quartzite

Quartz (SiO₂)-rich metamorphic stone; exact identification is uncertain from the photograph

Calcite (likely chalky calcite fragment)

Calcite, calcium carbonate (CaCO₃)

Banded Onyx (Calcite Marble)

Calcite (CaCO3) - Trap-rock or Cave Onyx

Rounded quartz-rich pebbles

Likely quartzite or quartz-rich sandstone; predominantly microcrystalline quartz (SiO₂)

Black Marble with Quartz Veining

Metamorphosed Limestone (Recrystallized CaCO3)

Botryoidal calcite (likely calcite concretion)

Calcite, calcium carbonate (CaCO₃)

Blue Calcite

Calcium Carbonate (CaCO3)

Polished black-and-white banded stone, likely a dendritic agate or marble

Uncertain; probable calcite marble or chalcedony agate with white mineral veining

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Yellow Calcite

Calcium Carbonate (CaCO3)

Lapis Lazuli

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

Honey calcite

Calcite (CaCO₃), likely iron-stained or naturally honey-colored

Cut limestone masonry

Calcitic limestone, predominantly calcium carbonate (CaCO₃)

Yellow calcite

Calcite (CaCO₃)

Orange Calcite

Calcium Carbonate (CaCO3)

Foliated metamorphic rock, likely marble or calc-schist

Calcite-rich marble/calc-schist; predominantly CaCO₃ (calcite), with possible mica and quartz

White Marble (often sold as Caribbean Calcite or Pistachio Calcite in this form)

Recrystallized Calcite (CaCO3)

Honey Calcite

Calcium Carbonate (CaCO3)

Tumbled speckled pebble, likely marble or limestone

Calcite-rich carbonate rock; possibly impure marble (CaCO₃)

Blue-gray calcite-bearing marble

Calcite (CaCO₃), recrystallized as marble; possibly minor quartz or dolomite

Tumbled zebra stone, likely zebra marble or banded calcite

Zebra marble (recrystallized calcite, CaCO₃), possibly black-and-white banded calcite

Lapis Lazuli

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

Lapis Lazuli

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

Lapis Lazuli

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

Lapis Lazuli

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

Tumbled banded calcite

Calcite, CaCO₃

Limestone

Calcite (CaCO3)

Raw Calcite

Calcite (Calcium Carbonate - CaCO3)

Onyx Marble (Banded Calcite)

Calcite (Calcium Carbonate, CaCO3)

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite

Calcium Carbonate (CaCO3)

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite

Calcium Carbonate (CaCO3)

Optical Calcite (Iceland Spar)

Calcium Carbonate (CaCO3)

Picasso Jasper

Microcrystalline Quartz (SiO2)

Pink Polished Marble (or Limestone) Pillar

Recrystallized Calcium Carbonate (CaCO3)