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Most marbles were formed when the calcium created from shells & bones from prehistoric life forms combined with carbon dioxide from water. The result is 300 million year old calcium carbonate, which is the fundamental mineral composition of marble. The veining in most marbles is usually only 5% – 10% of the total coloration of the stone.
Soft gray to dark black veins. Medium to heavy veining. Very white background coming from the Danby Quarry.