Marble is a non-foliated metamorphic rock formed from the regional or contact metamorphism of limestone or dolostone. Its calcium-carbonate makeup contains calcite and/or dolomite with fine to coarse crystal sizes. In the design industry, only marbles made from limestone are labeled “marble” while those made from dolostone are labeled “soft quartzite”. Although marble can be used outdoors in dry climates, it is not recommended for outdoor use in wet climates. Notable marbles can be found in the sculptures and architecture of Italy and ancient Greece, as well as India’s Taj Mahal.