Letter K

Karat

Measurement of purity used in showing the fineness of gold. One karat is 1/24 pure gold; 24-karat gold is pure, .999 fine.

Kennedy Half Dollar

U.S. coins issued beginning in 1964 having a face value of 50 cents.

Key Date

The opposite of common date. Coins with low mintages or with mintages having few survivors. See Rare, Scarce.

Kilo Bar

A precious metal bar weighing one kilogram (32.1507 troy oz.)

Kilogram

1,000 grams (32.1507 troy oz.)

Koala

Australian bullion coin backed by the Australian government. These coins have been minted since 1987. Coins are minted in gold, silver and platinum, with the designs changing annually.

Krugerrand

See South African Krugerrand.

Kt (Karat)

Measurement of purity used in showing the fineness of gold Purity is scaled from 1 to 24. 24 karat is pure gold.