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GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

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Can You Help Me Find a Jeweler?

One frequent request GIA receives is, “Can you recommend a reputable jeweler?” The jewelry-buying landscape offers so many options: buying online, through retail chains, neighborhood jewelry stores, and even independent sellers. Establishing a relationship with a jeweler can seem daunting and confusing. GIA is here to help. While it can’t recommend specific jewelers or businesses, it does offer tools and tips to help you navigate your way through choices. (more…)

Peridot: The Extreme Gem

August’s fascinating birthstone may be called the “extreme gem” because it is formed in the most extreme conditions, found in lava, meteorites and deep within Earth’s mantle. Peridot has been found in pallasite meteorites, which contain remnants of our solar system’s birth. In 2006, peridot was found in comet dust brought back from the Stardust robotic space probe. (more…)

7 Factors Describe June’s Birthstone: Pearls Part 3

Celebrated for its mesmerizing beauty, the Grace Kelly of gems is June’s elegant birthstone–the pearl. We previously discussed the pearl’s history and lore, and the different types of pearls. Now let’s delve into how a pearl’s value is assessed, and what to look for when purchasing a pearl. (more…)

"Maze" leaf earrings, set in sterling silver and Mother of Pearl.
GIA Museum features designer Kara Ross in “Aluminati: Students to Stars”

An exciting new exhibit series is making its way through GIA Headquarters in Carlsbad, California. “Aluminati: Students to Stars” highlights the talents of GIA alumni who have made waves in the gem and jewelry industry. The first exhibit in the series, featuring designer Kara Ross, debuted earlier this month and will run through November. (more…)

Inaugural Gemstones

When the 57th President of the U.S. was sworn in on January 21st, many looked to First Lady Michelle Obama to set the stage for American fashion trends in 2013. The First Lady did not disappoint when she appeared at the inaugural ball in geode shaped diamond earrings and bangles by American designer Kimberly MacDonald. (more…)

GIA Celebrates Birthstones – Aquamarine, the Gemstone of the Sea

Aquamarine, the March birthstone, evokes the colors of the sea. From deep green-blue hues to light, slightly greenish-blue, they are often free from inclusions and as clear as water, symbolizing purity of spirit and soul. (more…)

September Birthstone: The Sapphire

September’s birthstone, sapphire, is unique among gemstones. It is a very hard gemstone, second only to diamond. Sapphire is a variety of the mineral corundum. While other stones are known for their singular hues, sapphires come in a variety of colors. (more…)

How to Choose a Reputable Jeweler

When considering the purchase of a gem or piece of jewelry, it is important to find an educated jeweler with a trustworthy reputation. A professional jeweler will have the knowledge and training to help you make an informed purchase. A jeweler with a reliable reputation will strive to understand your preferences,  provide you with a variety of purchase options, and do so in an honest and straightforward way. (more…)

diamond ring
What is a Solitaire Setting?

A diamond solitaire refers to any piece of jewelry with a single diamond. Diamond solitaires can be a ring, necklace, earring or even men’s jewelry. They have come to mark some of the most significant occasions in one’s life, like sweet-sixteen, anniversaries, and the most notable, an engagement proposal. (more…)

anatomy of a diamond
Why Cut Matters (Part 2)

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…)

Platinum ring featuring a nearly 13-carat cushion cut zultanite and diamonds.
Zultanite – A Relatively New, Extremely Rare Gemstone Popular in Jewelry Design

Zultanite is an extremely rare gemstone used in jewelry design, and was a popular choice at the 2011 Couture conference, which features the most unique, innovative and inventive jewelry design. Famous jewelry designers such as Stephen Webster, Erica Courtney and Rhonda Faber Green all incorporated zultanite into their collections. Zultanite changes color in light, ranging from a kiwi green with flashes of yellow in sunlight conditions to raspberry hues in candlelight. (more…)

Cut: The 4th C

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…)