Home >> Collecting >> Coin Collecting

How to Clean Half Dollars

Half dollar coins often become tarnished or blackened as their silver or copper-nickel ingredients oxidize. The effect, called toning, can actually increase the worth of older coins. Before deciding to clean a potentially valuable half-dollar̵2;such as a coin produced prior to the mid-1960s̵2;consider having it appraised at a local coin dealer or comparing it with similar coins selling online. If the coin isn̵7;t highly collectible and you don̵7;t mind potentially reducing future value, you can use a mild, non-abrasive cleanser to gently clean it up.

Things You'll Need

Olive oil
Jar lid or other container
Towel
Baking soda (optional)

Instructions

- 1
  Pour a thin layer of olive oil into a jar lid or other small container. Submerge the half dollar in the oil for up to two days, turning it over once to coat both sides.
- 2
  Remove the half dollar from the olive oil. Gently wipe off oil with a soft cloth. Rinse the coin with distilled water, as minerals in tap water can cause spotting (Reference 2)
- 3
  Place coin on a towel and allow to air dry. Do not rub dry.
- 4
  If the half dollar is not clean enough for your taste, baking soda can provide a clean, shiny finish. Mix one part baking soda to one part water. Use your fingers to gently scrub the coin with the mixture. However, keep in mind that a squeaky clean finish can reduce a coin̵7;s value.

Coin Collecting