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GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

September’s birthstone, Sapphire, is one of the most beloved gemstones. Considered one of the “Big Three” (along with ruby and emerald),  sapphire stepped into the spotlight with Princess Diana’s famous engagement ring, which Prince William then bestowed to Kate Middleton when he proposed in 2010. (more…)

If you’re intrigued by the origin of gemstones, then you’re probably going to love ammolite. Ammolite is iridescent fossilized ammonite shells found in Southern Alberta, Canada. (more…)

All gemstones are gifts of nature. But what about when certain gems glint or glow with subtle hues that defy description? Different light conditions can turn a dazzling gem into a phenomenal one. (more…)

Known to Egyptians as the “gem of the sun,” the yellowish green peridot has been treasured since the earliest times, and is the birthstone for August. It’s thought that this gemstone is 4.5 billion years old, as it’s found in meteorite remnants dating to the solar system’s birth.

If you’re shopping for August’s birthstone, our Peridot Buying Guide offers tips and advice on what to look for, particularly as it relates to cut, one of the most important factors in a peridot’s appearance.  (more…)

In the past century, pearls have gone from some of the most expensive and rarest objects to jewelry that many of us can afford.

How this happened and what the future holds is a fascinating story. In part one of our series on cultured pearls we discussed how three Japanese men created techniques to produce the first akoya cultured pearls, which gave birth to the modern cultured pearl industry. Today, we dive into South Sea cultured pearls, Tahitian cultured pearls, and the rise of China as a leading cultured pearl producer.

Ready to set sail and learn about these treasures? (more…)

Buried deep in the Himalayan foothills of Afghanistan lies a bountiful supply of rich, deep green emerald, and the promise of seeing these beautiful rough gems lured Andy Lucas, GIA manager of Field Gemology in Carlsbad, to this scenic but beleaguered land.

Lucas travels around the world gathering details of the mine to market story for GIA education courses and its scientific publication, Gems & Gemology. And this time, his destination was the remote emerald mines of Panjshir Valley.  The valley’s name means “five lions,” a tribute to five spiritual brothers who once lived there. When he arrived, he found a rugged land with spectacular vistas. (more…)

The color of love, anger, passion, fury, vibrant red ruby is July’s birthstone. It makes an ideal romantic gift, not only for those who celebrate July birthdays, but for all women. However, ruby can command the highest per-carat price of any colored gemstone. These stunning red gems are consistently breaking auction records, as demand for ruby continues to rise. (more…)

Before the development of cultured pearls, only natural pearls were available – and their value was astronomical.

“I’m going to have the most expensive dinner in history,” Cleopatra supposedly boasted to Marc Anthony. She then dissolved a large natural pearl in a goblet of wine and drank it. Then there was the Roman general, Vitellius (15 A.D.-69 A.D.), who sold a natural pearl from one of his mother’s earrings to cover the expenses of a military campaign. (more…)

A strand of pearls is one of the most glamorous pieces of jewelry a woman can wear, yet these lustrous beauties have humble origins.

Pearls are produced by mollusks – soft-bodied saltwater or freshwater animals possessing one (univalve) or two (bivalve) shells. Mollusks are invertebrates meaning they lack a spine or vertebrae. Scientists estimate there are over 100,000 different species of mollusks in the world’s waters. However, only a few dozen of these species produce pearls and only about half of them are used to produce cultured pearls. (more…)

Perhaps the most popular gem of all time, June’s birthstone–the pearl–is as versatile as they come. Considered by many to be a staple of every woman’s wardrobe, the pearl is quite likely the earliest gem used for adornment. Our early ancestors foraged seashores and riverbeds collecting mother of pearl shells for ceremony and exchange – and when the rare pearl was found, it became a sacred possession. (more…)

The pearl has been shrouded in myth and mystery since antiquity.

The ancient Romans imagined they were the tears of gods and angels. The ancient Chinese thought they offered protection from fire-breathing dragons. And Europeans believed they symbolized modesty, chastity, and purity. (more…)

Chances are you’re probably giving your mother flowers this Mother’s Day. In the U.S., nearly 70% of all gifts given on Mother’s Day are flowers. It’s a sweet tradition that’s centuries old. If you want to treat your mom with flowers that won’t wilt or fade, consider floral jewelry instead. (more…)