MARQUISE - Almost executively cut for diamonds. Pointed oval shape.
METAPHYSICAL - Of or relating to metaphysics.
METAPHYSICS - An underlying philosophical or theoretical principle: a belief in luck.
MOH'S SCALE OF HARDNESS- The Mohs scale of mineral was devised by the German mineralogist Frederich Mohs (1773-1839), in 1812. The scale is not a linear scale, but somewhat arbitrary.
MOSAIC - A mosaic is a group of different colored stones fit together and polished to present a picture. They are set on top of the base material.
MYSTICAL - Having a spiritual reality or import not apparent to the intelligence or senses.
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