For diamonds with a polish grade of Excellent to Good, any polishing defects are not visible to the naked eye, and should have no impact on the diamond's overall appearance. For diamonds withclaritygrades of I1 or lower, even a polish grade of Fair is acceptable, since these diamonds alre...
Find out how symmetry affects the appearance and price of a diamond. Understand how diamond symmetry is graded by GIA, and when symmetry is most important in the selection of a diamond.
Depending on the size, number, placement or colour of these characteristics, they may or may not be visible to the naked eye. 99% of diamonds are not graded as flawless and most diamond experts value these inclusions as a mark of character, much like the veining present in marble, or a...
T he 67.2-carat brilliant-cut diamond, so aptly named The Aten by Sotheby’s, is the largest of its type in the world. A round stone with the colour classification of Fancy Vivid yellow graded by GIA, it has a solar presence that brings to mind the Aten, a briefly venerated God of ...
Silver-tone rings like white gold or platinum will make discolorations in a diamond more visible. This makes a higher color rating more important for those rings. You can still put a twist on this design if you choose rings with black diamonds over those with colorless gems. Sometimes the ...
we’ve seen diamonds graded by non-GIA labs receive a report that claims the diamond is 1-2 colour grades off what the GIA would give that diamond. So while someone might think they’re getting a deal on a D colour diamond with a non-GIA certificate, they may just be overpaying for...
Diamond colour is one of the most important factors in determining the value of a diamond. Diamonds are usually graded on a scale from D (colourless) to Z (tends to be yellow or brown). A person can buy a diamond with any colour grade, and it will be worth something. The price will...
in Ethiopia. This type of opal can be purchased (online) for a fraction of the price of Australian opal and is just as mesmerizing. Opal gets graded on its weight in carats (0.2 gram), color, pattern, type and rarity. Not necessarily in this order. Most of the rough stones you can ...
In 1927, the error occurred on coins that emerged from the San Francisco mint facility. And even at low grades, they’re worth good money. An example graded VG10 (very good) is worth about $100. And a 1927 Two Feather Buffalo nickel graded MS64 sold at auction in 2021 for $2,280....
There exists an urgent medical demand at present to develop therapeutic strategies which can improve the treatment outcome of hepatocellular carcinoma (HCC). Here, we explore the biological functions and clinical significance of PBOV1 in HCC in order to