opal

Disclosing enhancements is one of the most important responsibilities gemologists face. In fact, many countries are passing stricter laws…

Some well-known jewelry stones owe their colors to the effects of radiation. Occasionally, gemstones receive radiation treatment in laboratory…

Natural radiation can create beautiful colors in many gems. Learn how natural radiation works and what gems are most commonly affected by it.

Learn the story behind the 294-ct trilliant morganite cut by Steve Moriarty of Moriarty’s Gem Art and watch his gem-cutting demonstration.

There are key differences between gemology and mineralogy. Learn about these disciplines and how studying mineralogy can benefit gemologists.…

Some treatments add lab-created material to mined gemstones. The part-natural, part-synthetic nature of these gems has prompted some in the…

An assembled gemstone is constructed from two or more combined materials. Gemstone doublets and triplets, intarsias, and rhinestones are all…

All gemstones need regular maintenance to look their best, but some need more attention than others. Like opal and pearl, turquoise requires some…

According to some estimates, less than 5% of all turquoise mined worldwide is suitable for gem use without enhancement. Consequently, turquoise…