To remove tarnish from costume jewelry, start by picking off as much as you can using a toothpick or toothbrush, then try removing anything left using metal polish or vinegar. While abrasive chemicals in metal polish and vinegar can remove tarnish and verdigris, they can also sometimes remove any gold plating.Know More
Scrape verdigris and tarnish off the metal with a wooden toothpick. This method works well when the jewelry has only small spots of tarnish. Follow up by brushing off the tarnish with a dry toothbrush.
Be careful with jewels that are glued into place rather than set. Squeeze a small dab of metal polish onto a clean, dry cloth, and gently rub the jewelry for 30 seconds. Repeat until you have removed as much tarnish or verdigris as possible. Clean the jewelry with another soft, dry cloth.
If more tarnish remains on the jewelry, soak it in white vinegar for about 20 minutes. Don't try this with pearls, fake pearls or rhinestones, because the vinegar can damage the stones. After soaking, pull the jewelry out of the vinegar, and scrub it gently with a toothbrush, then dry it with a soft cloth.
Place the jewelry upside down on a clean towel so that the moisture runs away from the setting.
The mark 825 on jewelry indicates that the piece is made from real gold and has a gold purity rating of approximately 19 karats. Jewelers use three-digit marks to represent the gold purity level since standard markings, appearing stamped as 14K for example, can be off by a half-karat.Full Answer >
A 750 mark on jewelry means that the metal alloy used to make the jewellery contains 75 percent gold or another precious metal. Most precious metals used in jewelry are alloys because the addition of other metals improves hardness and durability. It also changes the color of the metal.Full Answer >
The abbreviation "DWT" in jewelry means "pennyweight." A pennyweight is a unit of mass equal to 24 grains, 0.05 troy ounce or 1.56 grams. Jewelers and gold buyers use pennyweights or grams to weigh gold and other precious metals.Full Answer >
To cast jewelry, create a mold, run it through a burnout cycle in a kiln, melt metal, pour it into the mold, and quench it in cold water. To finish the jewelry piece, remove it from the mold, file away the rough edges, and polish it.Full Answer >