Alexandrite gemstone buyer and jewelry collector guide holds information on history, lore, value and properties of the chrysoberyl varieties, including alexandrite and cymophane gemstones.
A light, silver-white, ductile, malleable metal, with a high electrical conductivity and good resistance to corrosion. Its chemical symbol is Al. Used in jewelry, for costume jewelry and junk jewelry.
A number of decorative articles made artistically of gold, platinum, silver, and precious stones that are worn for personal adornment, such as bracelets, rings, necklaces, etc.
In metallurgy a unit that expresses only to the purity of solid gold used in jewelry. In trade based on a scale of twenty-fourths, 24 karat means pure gold, 18 karat gold means, containing 18 parts gold to 6 parts of alloy, and 9 karat gold means, contain
A device for cleaning dirt and other foreign particles from gemstones and jewelry articles by subjecting them to ultrasonic vibrations immersed in water or other solvent. The articles must be free of stress flaws. Glass lenses and other bodies can be poli