Any sedimentary rock that forms, as sediments settle out of a solution, is called a chemical sedimentary rock. Sediments can settle out of a solution either by the liquid in the solution evaporating, or by too much of the sediment dissolving in the solution (called supersaturation).
A lozenge (â), often referred to as a diamond, is a form of rhombus. The definition of lozenge is not strictly fixed, and it is sometimes used simply as a synonym (from the French losange) for rhombus. Most often, though, lozenge refers to a thin rhombusâa rhombus with acute angles of less than 45Â°.
The shape refers to the appearance of the stone, and the cut to the diamond's ability to reflect light. Most diamond shapes are round, square (cushion), rectangular (princess, Asscher, emerald, radiant), heart-shaped, pear-shaped, oval, or marquise (like a pear but pointed on both ends). The easiest way to distinguish the two is with pictures. The picture below shows the ten most common diamond shapes.