Gemological formulas identify the chemical composition of gems and minerals. Learn what the symbols, numbers, and parentheses mean.
Trapiche emerald gems are some of the world's rarest emeralds. Learn where they're found and how their characteristic “spoked wheel” patterns are formed.
Emerald treatments, such as oiling, are very common. Learn what these techniques do, how emeralds are graded, and what green gems make great alternatives.
Emerald enhancements involve a variety of different types of fillers, impregnations, and dyes. These treatments can improve the beauty of emeralds.
Emerald crystals can grow very large. Learn about some of the world’s largest emeralds, old and new, uncut or faceted, rough or carved.
Considering buying gems in Afghanistan? Learn which Afghan gemstones to seek out, which to avoid, and prepare for a “buyer beware” experience.
What's the best doublet glue for creating assembled stone jewelry? Learn about the choices as well as tips for making the bond between gemstones stick.
Oil treatment is a standard industry practice for enhancing emeralds. However, the treatments are not permanent. Learn how to re-oil emeralds safely.
What's the difference between a lab-created emerald and a natural emerald? Is a synthetic gem a real gem? Learn the facts before you buy emerald jewelry.
Emeralds get their green color from chromium and vanadium. Learn how the presence of these elements affects their formation and causes emerald fractures.