A Midsummer Night’s Green
By: Jeffrey M. Bertman Graduate Gemologist It is hardly an accident that the gem-quality variety of the mineral olivine, known as "peridot," is [...]
Making Judgement Calls
By: Jeffrey M. Bertman Graduate Gemologist Generally speaking, when shopping for jewelry, consumers should focus more on quality than finding a bargain. One [...]
Which “C” Comes First?
By: Jeffrey M. Bertman Graduate Gemologist You are probably already familiar with the "4 C's" (Cut, Clarity, Color, and Carat weight) of diamond [...]
By Any Other Name
By: Jeffrey M. Bertman Graduate Gemologist Both ruby and sapphire are varieties of corundum, the second hardest mineral known to science. While the [...]
Declaration of Independence
By: Jeffrey M. Bertman Graduate Gemologist Approximately a dozen years ago, women began to come to the realization that they did not have [...]
Digital Wideband
By: Jeffrey M. Bertman Graduate Gemologist Whether it is an oversized cocktail ring featuring a huge colored gemstone, a wrist adorned with a [...]
The Gemstone that Changes Color
By: Jeffrey M. Bertman Graduate Gemologist Alexandrite, the June birthstone, is a most unusual variety of the chrysoberyl mineral that can change its [...]
Cushioning Effect
By: Jeffrey M. Bertman Graduate Gemologist While round brilliant cut diamonds are far and away the most popular choices for engagement rings, cushion-cut [...]
It All Depends On How You Look At It
By: Jeffrey M. Bertman Graduate Gemologist Anyone desiring to get the most value out of a gemstone purchase should look into those gemstones [...]
On the Watch
By: Jeffrey M. Bertman Graduate Gemologist Wristwatches are jewelry accessories that never go out of style, but their style constantly changes. Perhaps the [...]