joi, 27 iunie 2013

Diamonds Colors - Black Diamonds

Black diamonds
are the rarest in the diamond family.


History
Black diamonds were created 3.5 billion years ago. Over time, they pushed their way up to the surface through volcanic eruptions about 1 million years ago.
Black diamonds are considered to be "young," as clear diamonds were formed approximately 4.25 billion years ago.


Features
Full of scratch marks containing sulfide deposits, black diamonds are opaque. They are just as hard as clear diamonds, and Brazil is the major supplier of black diamonds. Uniformity of color is quite uncommon, as most black diamonds appear gray and dark gray, and the surface of the diamond is pitted, which makes cutting challenging.



Mythology
Conflicting myths concerning black diamonds appear in different cultures. In India, black diamonds were considered cursed and a sign of death, as they resembled the eyes of snakes and spiders. In Italy, however, fighting couples could save their marriage simply by touching the stone, as it was believed that all of their troubles would leave them and enter the stone. The Karloff Noir diamond is believed to be the world's largest cut black diamond at 88 carats, and legend has it that when touched, it endows the person with good luck, fortune and happiness.

Men's Jewelry
The black diamond has been traditionally used in men's jewelry; however, today, more women are interested in acquiring black diamond jewelry as well. Often set in platinum or titanium in men's rings, the black diamond does not have the fire of white diamonds, but its luster has a beauty of its own. Titanium's color can be altered to match the black diamonds, which provides a striking effect when worn.

Women's Jewelry
In women's jewelry, small black diamonds are often paired with small white diamonds to take advantage of the beautiful contrast between the two. Interestingly, black diamonds look better contrasting with white, rather than clear diamonds, so clarity in the range of G to I would contrast better than finer diamonds. Consequently, the white stones would also cost less, which helps to offset the price of the black stones. Cocktail rings, earrings, pendants and tennis bracelets have enjoyed a surge in popularity, as women's fashions continue to use black and white as the basis for most designs.

Wedding Jewelry
Since the turn of the twenty-first century, black diamonds have become more popular in wedding jewelry, with both bride and groom sometimes choosing wedding bands with black diamonds set in them. Sometimes, the bride will also choose an engagement ring with either a black diamond main stone surrounded by white diamonds, or a white diamond solitaire with black diamond accent stones.

Fashion Jewelry
Genuine black diamonds are not used in fashion jewelry. However, names of certain stones may confuse the purchaser.

The biggest black diamond in the world

The Spirit of de Grisogono, at 312.24 carats, is the world’s largest cut black diamond, and world’s  5th largest diamond. In a white gold mounting, it is set with 702 white diamonds totaling 36.69 carats. This diamond originally had a rought weight of 587 carats and was mined several decades ago in west Central Africa before being imported into Switzerland.

luni, 3 septembrie 2012

About Diamonds first to buy!!!


                                About Diamonds













Does the thought of purchasing a diamond ring overwhelm you? Don't think you 
know enough about certificates, inclusions, grading scales, and colors? Or do you know the basics, but need a refresher course?
A good understanding of diamonds is necessary before you begin shopping. Our guide gives you the basics -- the all-important "four Cs", a glossary of terms, special information on "fancy shapes," a Diamond FAQ, and more.


Diamond Grading, Grades


When purchasing certified diamonds it is important to understand the diamond grading criteria used by the labratories performing the certification.
Diamond grading covers numerous aspects of each individual diamond's qualities, but there are four grades which are critical to understand: cut, clarity, color, and carat weight. There are additional ratings and measurements noted on a diamond certificate, but they generally fall under the diamond's grade in one of the Four Cs. For example, measurements listed such as "depth" and "table" are part of the description of the diamonds cut..
You can learn more about how diamonds are graded by reading the articles listed below.

Diamond cut

Cut is probably the most important quality factor, and most challenging, of the four Cs to understand. The brilliance of a diamond depends heavily on its cut.

Diamond clarity

Most diamonds contain some inner flaws, or inclusions, that occur during the formation process. The visibility, number and size of these inclusions determine what is called the clarity of a diamond. Diamonds that are clear create more brilliance, and thus are more highly prized, and priced.

Diamond color

Colorless diamonds are the most desirable since they allow the most refraction of light (sparkle). Off white diamonds absorb light, inhibiting brilliance.


Carat

A carat is the unit of weight by which a diamond is measured. Because large diamonds are found less commonly than small diamonds, the price of a diamond rises exponentionaly to its size. Read this guide to get a better understanding of what a carat is and how it affects the appearance of a diamond.

Certificates

The diamond certificate, which is sometimes called a grading report, is a complete evaluation of your diamond that has been performed by a qualified professional with the help of special gemological instruments. Each stone bears its own recognizable, individual characteristics, which is listed on the certificate.