24 karat gold is pure gold. 12 karat gold is exactly half gold. A keeper ring is a ring which is used alongside another, more valuable ring to keep it securely on the finger.
Keystones are usually step cut.
The costume jewelry manufacturer Schreiner uses keystones in many of its pieces. The king cut is a modification of the brilliant cut which is used for large diamonds. This cut has 86 facets. Anne Klein jewelry and buttons have been manufactured by the Swank Inc. since 1981. Anne Klein's logo is a lion's head on a square tag.