From the experts

You may not know that girdle thickness happens on a sliding scale. For example, "Thin" is 10X wider than "Very thin." In fact the AGSL range for thin is the widest of all ranges. You can see below that it's wider than the ranges for medium and slightly thick...

Why is fluorescence devalued by miners, producers and jewelers alike? Why is it considered a negative by so many professionals? Why is there such prejudice against a harmless chemical element that some diamond wearers love? Most importantly Why doesn't...

The whole purpose of your driver’s license photo is identification. That's also the purpose of a diamond grading report. The graders note and plot what they see at 10X magnification so other professional gemologists can verify the same characteristics i...

Permit me to explain how, in both fridges and diamonds, it's more beneficial for a seller to discount for deficits such as scratches (in fridges) or performance-reductions (in diamonds) than to repair the deficits. Please read on... Fridges are sold in many plac...

We regularly inform our dealers about how we are rejecting hundreds of starting crystals for every diamond we craft. And while the results are seen and appreciated, the abundance of diamonds they'll never see is something of an abstraction, just stated as "hundreds rejected."...