A 12.11-carat fancy intense blue diamond sold for $15.9 million (HK$122 million) at Christie’s Hong Kong Magnificent Jewels auction. The internally flawless marquise-shaped, brilliant-cut gem ...

3.01-carat fancy vivid blue diamond with an estimate of $4.3 – $6.3 million was withdrawn from the ...More sale. Sotheby's. Sotheby’s Part II Magnificent Jewels & Nobel Jewels – Geneva sale ...

During most of the Middle Ages, the structure of a diamond was known to be an octahedron, like two pyramids joined bottom-to-bottom. In the 15th century, the point cut — regarded by many as the ...

New Diamond, Old Cut. Image. Hayley Litchfield’s custom engagement ring by Ms. DeYoung: A vintage 2.23-carat diamond in a yellow gold bezel setting.