An extremely hard, highly refractive crystalline form of carbon that is usually colorless and is used as a gemstone and in abrasives, cutting tools, and other applications.
A piece of jewelry containing such a gemstone.
A figure with four equal sides forming two inner obtuse angles and two inner acute angles; a rhombus or lozenge.
Games A red, lozenge-shaped figure on certain playing cards.
Games A playing card with this figure.
Games The suit of cards represented by this figure.
Baseball An infield.
Baseball The whole playing field.
Of or relating to a 60th or 75th anniversary.
To adorn with or as if with diamonds.
diamond in the rough One having exceptionally good qualities or the potential for greatness but lacking polish and refinement.