Marble is limestone

Marble is limestone that has crystallized naturally over a period of time. Marble is classified into four groups, Groups A, B, C, and D. These are broad classifications and relate only to soundness and working qualities. However, for the purpose of this maintenance guide marble has been classified as exterior or interior maintenance of marble. The test used for water absorption is ASTM C97. Marble is cut into blocks, slabs or tile in various thickness and sizes. Marble flooring is very sensitive to acids and alkalis and can be stained if spills are not wiped up immediately. If marble flooring is installed in an area where staining liquids are liable to cause problems, then the flooring should be sealed and finish applied.

Marble 2: Marbles are basically metamorphosed limestones. Once limestone is subjected to heat and pressure, the calcium carbonate re crystallizes into marble.

Marbles have similar characteristics to limestones and are typically used on the same applications, though, marbles are almost always more aesthetically valuable and available in much wider range of colors.

More resources:
Green Granite
The marble countertops and tub surround are complemented by limestone floor and wall tiles. Tones in the mint green, harlequin-patterned wallpaper are echoed in a dramatic central crystal chandelier from Decorative Crafts with color accents.
Commercial Granites
We installed engineered granite countertops in our kitchen in New York, and replaced the old sink with an engineered granite model.