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GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

jennifer aniston

As seen during the 2013 Oscars, vintage jewelry and diamonds continue to live in the spotlight, as evidenced by this 19th century oval and cushion cut diamond bracelet worn by Jennifer Aniston. But do you know the storied history behind your favorite vintage diamond cuts? (more…)

A diamond’s cut and its shape are often confused, but we’re here to help! A diamond’s shape refers to its outline when viewed face up. A diamond’s cut refers to its facet arrangement. (more…)

Platinum and diamond engagement ring with channel set side stones.

When choosing an engagement ring, there is more to consider beyond gemstone types. We covered popular center stone settings, and now we’ll share with you a few side stone setting styles. There are many options designed to enhance the gemstone’s beauty while reflecting the personality and lifestyle of its wearer. (more…)

Archduke diamond

On November 13th, 2012 Christie’s Geneva auctioned one of the world’s most important diamonds, the Archduke Joseph, for $21.5 million. The 76.02 ct, D-color Internally Flawless cushion cut went for more than $280,000 per carat, a new record for colorless diamond. (more…)

One of the hardest of the 4Cs to understand may be a diamond’s cut. A well-cut diamond displays the unique sparkle we associate with diamond. (more…)

asscher cut earrings

Some diamond cut’s never go out of style, especially when they boast a royal heritage and have been redesigned and reinvented. Such is the case with the popular Asscher cut. (more…)

emerald cut diamond

Angelina Jolie and Brad Pitt made headlines earlier this year when they finally announced their engagement. Soon thereafter, Jolie was spotted wearing an engagement ring that featured a large, Emerald cut diamond center stone. While an Emerald cut center stone is not the traditional look for an engagement ring, non-traditional engagement rings seem to be making news more frequently. (more…)

When it comes to diamonds, most consumers tend to use the words “cut” and “shape” interchangeably.  But for diamond professionals, there is a big difference.  Diamond Shape refers to the outline of the stone (pear, oval, round, etc.).  Diamond cut refers to a stone’s facet arrangement.  So a shape can be faceted in a variety of ways, or cutting styles. (more…)

anatomy of a diamond

When a diamond interacts with light, every angle and every facet affects the amount of light returned to the eye. The sparkle of a diamond, then, has everything to do with how well the cut of the diamond was planned and executed. Although a diamond’s value is based on its unique combination of color, clarity, cut, and carat weight (the 4Cs), a diamond’s cut is the most complex to assess, and it’s the only component that can be directly affected by the diamond cutter. (more…)

Most consumers don’t realize the long, complicated, precarious journey a diamond takes from its humble beginning amidst tons of rock in the Earth to its sparkling transformation in a jewelry store counter. An especially critical point in the diamond’s journey is its time with the diamond artisan, who must cut the diamond to maximize its beauty. (more…)

When you oooh and ahh over a sparkly diamond, to a large extent you’re reacting to its cut. What you want is light to enter through the crown table (the flat part at the top) and go to the pavilion (the pointy part at the bottom), where it reflects from one side to the other, and then back out of the diamond through the crown table. This ensures maximum sparkle and brilliance. Think spectacular laser show! (more…)

All diamonds are rare and no two diamonds are alike. A diamond’s quality and rarity is determined by its unique combination of characteristics of Color, Cut, Clarity and Carat Weight.  The International Diamond Grading System™, used around the world since its invention by GIA in the 1950s, is based on the Four Cs. (more…)