A 7.03-carat fancy deep blue diamond mounted on a platinum ring by London high jewelry house, Moussaieff, is the top lot at Christie’s Geneva Magnificent Jewels sale. The blue rectangular-cut ...

The diamond mounted on a ring accented with brilliant cut diamonds had an estimate of $550,000 - $850,000. Several important lots that did not sell as well: They include the following: A 2.11 ...

Start With The Blade. Regardless of what else you do to make a circular saw cut more accurately, even if you make a simple freehand cut, you need to match the blade to the job. Don’t use a rough ...

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.