Real gold jewelry is made of a solid gold alloy, whose gold content is above a certain threshold. In the United States, for example, pieces containing less than 58.3% gold (10 karats) are not considered gold for commercial purposes. What people usually refer to as fake gold is jewelry that is made of another metal (such as nickel, copper, silver, etc.) and covered with a layer of gold (gold plated) or with a thin gold sheet (gold filled). How to Tell If Gold Is Real. Below are some of the more reliable ways to test jewelry for gold: Acid Test
In-office teeth whitening cost: $450-650 per visit (on average) nationwide. COST PROFESSIONAL DISPENSED TAKE-HOME TEETH WHITENING. Many cosmetic dentists have the opinion that professionally dispensed take-home whitening kits can produce the best results over long term.
A RealAge answered. You can expect to pay anywhere from $10 to $40 for a tray-based teeth whitening kit purchased over the counter (OTC) from a pharmacy or other retail store. You can also purchase tray-based teeth whitening systems from dentists. These systems feature custom-fit tooth trays or mouthpieces, which is why they are significantly more expensive than OTC tray-based teeth whitening kits. Purchasing a tray-based teeth whitening system from your dentist may cost up to $500.