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GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

Turquoise: December’s Birthstone, Loved for its Sky Blue Color

Those celebrating December birthdays are fortunate to have a few birthstones to choose from – zircon, tanzanite, blue topaz and lapis lazuli, among them. But one of the best known and most loved December gems is turquoise, a gem that has been mined and used for thousands of years. (more…)

Citrine: November’s Sunny Birthstone

As the majority of the country heads into cooler temperatures of late fall/early winter, November’s birthstone, citrine, provides a much needed burst of sunshine. The warm, sunny color of this popular gemstone inspired its name, derived from the French word “citron,” meaning “lemon.” Its color ranges from saturated yellow to  reddish orange to pale  yellow. (more…)

Tourmaline: October’s Colorful Birthstone

Tourmaline has one of the widest color ranges of any gemstone. While October’s birthstone can be found in virtually every hue of the rainbow, the most popular varieties range from rich reds and pinks, to greens and yellows, to blues and violets. Some tourmalines are bi-colored and parti-colored, exhibiting two or more colors in a single gem – a feature known as color zoning. (more…)

Discover the Powers of Your Birthstone

Think of every passing year as an opportunity to celebrate with your birthstone. In fact, people have been wearing birthstone jewelry since the 15th century in Poland, when they were encouraged to own all 12. And while birthstone secrets and lore can be found right here on our blog, today we share what makes YOUR birthstone a powerful statement of your finest qualities. (more…)

Sapphire: September’s Regal Birthstone

September’s birthstone is perhaps most known for the extraordinary sapphire ring worn by Kate Middleton, originally belonging to Princess Diana. Taking a cue from the British royals, celebrities like Penelope Cruz have fueled the colored gemstone engagement ring trend, with sapphire leading the way. (more…)

Caring for June’s Birthstone: Pearls Part 4

The legendary beauty of June’s luminescent birthstone has been celebrated for centuries. We explored the pearl’s history and lore, the various types of pearls available, and how a pearl’s value is assessed and what to look for when purchasing a pearl. Now we are going to discuss how to care for one! (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…)

The Varieties of June’s Birthstone: Pearls Part 2

June’s lustrous birthstone is celebrated around the globe for its compelling beauty. Earlier this week we discussed the source and history of the pearl. Today we’ll be diving into the various types of pearls. (more…)

The History & Lore of June’s Birthstone: Pearls Part 1

The luminous pearl is June’s coveted birthstone. This enchanting treasure originating from the sea is a timeless wardrobe staple, beloved by fashion icons including Audrey Hepburn and Coco Chanel. In this four-part series, we’ll be (1) sharing the source and history of pearls, (2) exploring different pearl varieties, (3) assessing factors behind pearl value, and (4) learning about how to care for your pearls. (more…)

GIA Celebrates Birthstones – Tanzanite, Tanzania’s Treasure

Tanzanite, December’s birthstone, is found in the shadows of the majestic Mount Kilimanjaro in Tanzania, the only commercial source for the gemstone. (more…)

GIA Celebrates Birthstones – Forget Me Not With Turquoise

Turquoise, the December birthstone, has a distinct blue or greenish-blue color because it contains copper, and is most commonly found in China and the U.S. southwestern states Arizona, New Mexico, Colorado and Nevada. (more…)

GIA Celebrates Birthstones – Topaz, the Golden Gem

Topaz, November’s birthstone, is a mineral species that naturally occurs in a range of color, including various reds, pinks, purples, yellows, oranges, browns, and more rarely, pale blue. Topaz in yellow and reddish brown are commonly heated to create more desirable pink gems. (more…)