Lime is a calcium-containing inorganic material composed primarily of oxides, and hydroxide, usually calcium oxide and/or calcium hydroxide. It is also the name for calcium oxide which occurs as a product of coal-seam fires and in altered limestone xenoliths in volcanic ejecta. The International Mineralogical Association recognizes lime as a mineral with the chemical formula of CaO. The word lime originates with its earliest use as building mortar and has the sense of sticking or adhering.

Limestone fresh from a Norwegian quarry.

Colors
Red • Orange • Yellow • Green • Blue • Purple • Black • White • Pink • Brown • Gray (Grey)
Cyan • Magenta • Indigo • Violet • Rose • Gold • Silver • Bronze
Fuchsia • Beige • Amber • Lime • Lemon • Tan • Teal • Olive • Khaki • Sky Blue • Navy
Maroon • Crimson • Vermillion • Scarlet • Coral • Salmon • Peach • Cream • Lavender • Lilac • Aqua • Turquoise • Emerald • Ochre • Sienna • Umber
Light Gray • Dark Gray • Burgundy • Auburn • Ruby • Sepia • Taupe • Banana • Spring Green • Mint • Jade • Aquamarine • Azure • Sapphire • Amethyst • Plum • Neon • Ivory • Platinum
Apricot • Tangerine • Marigold • Wheat • Chartreuse • Moss • Kelly • Celadon • Periwinkle • Cerulean • Cobalt • Ultramarine • Blueberry • Iris • Grape • Thistle • Mauve • Orchid • Strawberry • Cerise • Vanilla • Chocolate • Mahogany • Chestnut • Ebony • Charcoal • Gunmetal • Key
Coquelicot • Persimmon • Sunburn • Peru • Goldenrod • Citrine • Vitellary • Dandelion • Pear • Mindaro • Goo • Slime Green • Sage • Asparagus • Harlequin • Erin • Malachite • Pakistan • Verdigris • Viridian • Alice Blue • Electric Blue • Capri • Cornflower • Glaucous • Victoria • Zaffre • Eggplant • Heliotrope • Puce • Mulberry • Amaranth • Snow • Pearl • Xanadu • Feldgrau
Eigengrau • Vantablack