Posts Tagged ‘antique diamond’

SOFT AS A PILLOW

Friday, July 29th, 2011

Little Miss Muffet sat on her tuffet, but you’d rather wear your cushion—diamond, that is.

Even before Catherine Middleton seamlessly blended old and new tradition when she wed Prince William, brides were blending antique-style jewelry with modern strapless dresses. The cushion-cut diamond, with its romantic vintage appeal, is a perfect center stone for antique-inspired rings with delicate details like scrollwork, engraving, and millegrain settings.

The cushion cut is a very old style of diamond cutting, dating back hundreds of years. Until the late 1800s, diamond-cutting technology had not advanced enough to produce the brilliant cut (characterized by kite-like facets radiating from the center of the stone), and it wasn’t until 1919 that mathematician and master diamantaire Marcel Tolkowsky devised a set of proportions that came to be the standard for an ideal-cut round brilliant. But until then, the cushion cut, along with the old mine and old European styles of cutting, were the best methods known to maximize a diamond’s natural sparkle. The cushion cut was favored for larger stones.

The cushion cut, also occasionally called a pillow cut, refers to its shape, which is a rectangle with rounded corners. Unlike the oblong emerald or radiant cut, however, a cushion cut is a short rectangle: its length-to-width proportion should differ by no more than 30%, and often it is much less.

Cushion cuts also feature larger facets than a brilliant cut, which give it a soft radiance more like an emerald cut than the fiery sparkle of a brilliant. But its larger facets can make inclusions and off-color more visible, and the quality of the cutting is absolutely central to the stone’s beauty. Because it’s not as forgiving as a brilliant cut, a cushion typically will be a higher-value stone than a comparable-size brilliant. But high-quality cushions are greatly prized by collectors, so it’s a sound choice for those who are worried about the long-term value of their diamond as well as its current romantic appeal.

The facet arrangements of a cushion cut shown face up (left) and face down (right). Note also that the cushion is a short rectangle; length to width ratio is within 30%.

Once the brilliant cut was devised, cushions grew rare. For a long time, the best—if not only—place to find one was in estate jewelry. But when the vintage look grew popular, diamantaires again began cutting cushions; this time, however, with modern technology that ensures a more consistent quality. Lucky is the bride today who doesn’t have to hunt that elusive but just-right piece of estate jewelry—she can simply recreate the look with a soft, super-feminine cushion cut diamond.

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WHEN IS A DIAMOND AN EMERALD?

Tuesday, July 12th, 2011

Why is an oblong diamond called an “emerald cut?”

Don’t worry—your diamond isn’t turning green with envy. In this case, “emerald” refers to one of the classic styles of diamond cut.

While the different styles of diamond commonly are called “cuts,” names like emerald, princess, pear, and marquise, oval, or round actually refer to the shape of a diamond, while the word cut technically refers to the arrangement of facets within the diamond to maximize light return. The way the individual facets are cut—their angles and proportions in relation to each other—is what gives a diamond its magnificent sparkle. That said, however, each of the traditional shapes also has a basic arrangement of facets, so using the word cut really is just fine.

An emerald-cut diamond got its name because it mimics the way emeralds are traditionally cut. Emeralds belong to the beryl family of minerals, while diamonds are pure carbon. The crystalline structure of a beryl grows in a vertical pattern, which lends itself best to the familiar oblong we often see in emeralds, especially for larger stones.

Because an emerald-cut diamond has such a large table (the top of the stone) in proportion to the rest of the stone, inclusions are especially noticeable with this cut. Equally noticeable is an off-color stone. For this reason, emerald-cut diamonds tend to be exceptionally high color and clarity, and therefore typically are more expensive than other cuts of the same weight.

Because of its facet arrangement, an emerald-cut diamond may not have the same degree of fire as other cuts. A brilliant cut, such as the popular round, has kite-like facets radiating from the center. A step-cut like the emerald has elongated parallel facets, and a mixed cut employs both types of facets.

At left, a face-up drawing of an emerald-cut diamond shows the large table and step-cut facet arrangement. At right, the stone is flipped over for a view of the facets underneath.

Think of an emerald cut diamond as a crystal clear pool of water reflecting sunlight, whereas a round brilliant is more like a twinkling star or a camera’s flash. For those who want the best of both worlds, diamond cutters have developed a newer version of the emerald cut, called a radiant cut, which is a mixed cut combining the shape of an emerald cut with the addition of some brilliant kite-like facets to reflect more light. While a radiant is a beautiful option, the elegance and quality of a classic, understated emerald cut remains unparalleled.

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