Even though there are several grades in every category, there are minor differences between the letter grades. D grade is the clearest and most precious, X grade is a dirty yellow and least expensive. Z grade-colored diamonds are the rarest and most expensive. A grade diamond so drenched with nitrogen that it becomes a deep, rich yellow is as rare as a colorless diamond.
Friday, November 27, 2009
The color of a diamond refers to the quality and saturation of color, or the depth of color in a diamond. The color of a diamond can range from colorless to a yellow or brown shade. A colorless diamond is rarer and more valuable because it appears white and brighter to the eye. The most valued system used today for evaluating diamond color was developed by the Gemological Institute of America, (GIA).
Wednesday, November 25, 2009
When cleaning diamonds, the key to a beautiful result is to be sure to remove dirt and debris from every corner and cranny of the ring. Filigree, Celtic, and other elaborate pieces need extra care, while simple solitaires may be cleaned more quickly and easily. The essential steps for cleaning diamond jewelry are:
- Decide whether or not the jewelry can be cleaned at home. If you are unsure of the type of metal, accent stones, or safety of the setting, it is best to leave cleaning to a professional. Also, antique and heirloom rings are more delicate and may need professional attention.
- Locate a cleaning space. A towel helps protect surfaces from cleaning chemicals and be sure to choose a location with sufficient lighting to see crevices as well as a location protected from loss (away from sink drains, etc.).
- Take away hairs or other fibers stuck in the prongs or setting.
- Presoak or wash the jewelry to remove loose dirt. If washing under running water, hold the jewelry firmly or use a sieve deep enough to have it without risk of loss.
- Dip ring in cleaning solution (diluted ammonia with three parts water, like a solution with mild clean-rinsing detergent, or professional cleaner).
- Softly scrub diamond with soft-bristle brush. Change angles regularly to work into crevices but keep a firm grip on the jewelry.
- When cleaning jewelry, use running water or fresh water dish and change angles to take away all cleaning solution.
- Use cloth to shine ring for maximum sparkle and shine.