Jewelry cleaning

Methods and risks

Maintaining a clean diamond can sometimes be difficult, as jewelry settings can obstruct cleaning efforts, and oils, grease, and other hydrophobic materials adhere well to a diamond's surface. Some jewellers provide their customers with sudsy ammonia cleaning kits. Some other jewellers sell ultra-sonic cleaners.

Cleaning can damage some jewelry. For example, some class rings are coated with a dark pigment to reduce their shininess. Ultrasonic cleaning can remove this coating. Also, many gems (such as emerald and pearl) are soft or porous. Cleaning agents can erode or infiltrate these gems.

Beauty of gems

Although it is not one of the 4 C's, cleanliness affects a diamond's beauty as much as any of the 4 C's (cut, carat, color, clarity).

A clean diamond is more brilliant and fiery than the same diamond when it is "dirty". Dirt or grease on the top of a diamond reduces its luster. Water, dirt, or grease on the bottom of a diamond interferes with the diamond's brilliance and fire. Even a thin film absorbs some light that could have been reflected to the person looking at the diamond.

Colored dye or smudges can affect the perceived color of a gem. Historically, some jewellers' diamonds were misgraded due to smudges on the girdle, or dye on the culet. Current practice is to thoroughly clean a gem before grading its color.

Cleanliness does not affect the jewelry's market value, as jewellers routinely clean jewelry before offering it for sale. However, cleanliness might reflect the jewelry's sentimental value: some jewellers have noted a correlation between ring cleanliness and marriage quality.

Related articles

• Jewelry
• Gemstones discussed in this article:
  • Diamond
  • Emerald
  • Pearl