Gold Jewellery
Gold Jewellery
Costco offers jewellery in either 14KT or 18KT gold with some wedding bands available in platinum. Costco is unable to customise metal preferences.
Gold is measured in karats (KT). Pure gold or 24KT gold, indicates that it is entirely 24 parts gold and is not commonly used in the manufacturing of jewellery due to its softness. 18KT and 14KT gold is mixed with other alloys. The percentage of gold to its alloy is what determines its purity.
For instance, 18KT is 18 parts gold to 6 parts alloy or 75% pure gold and will be stamped with either 18KT or 750. 14KT is 14 parts gold to 10 parts alloy or 58% pure gold and will be stamped with either 14KT or 585. The remaining percentage is a mixture of metals.
Costco offers various styles of gold jewellery in yellow gold, white gold and/or rose gold. White gold is gold that is plated with Rhodium which is a precious metal that gives white gold it's luster.
Care and Maintenance
Avoid contact with ammonia, chlorine and other harsh cleaning agents. Clean your gold jewellery with a soft, dry cloth to remove oils, soil or moisture. White gold may wear over time and may need replating to restore whiteness to your jewellery.