Rainbow granite
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Description
A granite stone with numerous mottled colors in a wavy pattern than can resemble a rainbow. Rainbow granite usually has a dark black or green background with pink, yellow and red crystals producing a variegated pattern (Brady 1971). It is quarried in Morton, Minnesota.
Additional Information
G.S.Brady, Materials Handbook, 10th edition, McGraw-Hill, New York, 1971.
Martus Stone at https://www.martusstone.com/product/rainbow-granite/