Jacques addresses the significance of the astounding Lucara Diamond recently discovered, and GIA's work helping dealers, ...

oval, rectangle, square and heart.” “Make sure that the diamond you are considering has a grading report – preferably from GIA! The 4Cs determine whether or not a diamond is of exceptional ...

Millions of diamonds are graded in GIA Laboratories annually. However, more and more counterfeit diamonds have shown up in the trade, becoming an increasing concern. To address this issue, a portable ...

Diamonds and other gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the same weight as a paperclip. (Don’t confuse carat with karat, as in “18K gold,” which refers to ...

But the Mohs scale is deceptive. The steps between the minerals are not evenly spaced. For example, diamond is only one number away, but it’s many times harder than gems in the corundum family.