The supply of diamonds tends to be plentiful for small stones, but extremely tight on really big diamonds. Consider buying diamonds in off-target carat sizes to get more value! Our diamond experts are are always eager to help you find the best stone for your needs. Learn more about diamond demand & supply. . .
Would you consider buying a 1 carat diamond without a certificate? Most folks wouldn’t. Consumers rely on the objectivity of a third-party gem lab to tell them the properties of the diamond they’re considering. So it is especially damaging to know that some diamond grading labs don’t do an ethical job when grading the diamonds. . .
The Gemological Institute of America (GIA) regularly hosts a symposium in order to keep people who work in the gem trade up to date with new developments. We have returned, and are brimming with new information and ideas, and I thought I might give a report of the proceedings. . .
Questions arise daily about the various scales we use in the jewelry business. Gold is weighed on a pennyweight or gram scale. Gems are weighed on a carat scale. Postage is weighed on an avoirdupois scale and pearls are sometimes weighed on a momme scale. Do you know if you are using an avoirdupois or a troy scale?
In all the years Rio has been presenting our Catalog In Motion® event alongside the Tucson Gem & Mineral show, this is the first year I had ever walked the show myself…
What’s happening is that most of the low-quality, inexpensive rubies now being sold in the market are not just “treated rubies” but something altogether different–a mixture of low-quality corundum infused with lead-glass. The amount of lead-glass present in the stones now in the marketplace often exceeds 25% and, in many cases represents 40% or more of the entire stone!
As you know, diamonds are sold by weight. I think we’ve all been trained to want a 1-carat diamond. But nature doesn’t care about our desires. Diamond crystals form independent of any market demand. The supply of diamonds tends to be plentiful for small stones, but extremely tight on really big diamonds. Nature is going to produce that exceptionally large crystal only once in a while.