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GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

May Birthstone: Where Do Emeralds Come From?

Emerald is the perfect May birthstone. Its rich color evokes the springtime green we see all around us. Yet emeralds are far from abundant: they are found in only where geological conditions are just right to produce this coveted green gem. Read on to learn more about this beautiful gem. (more…)

Famous Birthstone: Pearl – La Peregrina

Many of us share a timeless attraction to pearls— it’s a deep admiration that extends across cultures and continents. Maybe it’s because pearls are associated with water, a fundamental element of life. Or maybe it’s because this June birthstone comes from a living thing. Natural pearls are highly sought after due to their rarity. For those who prefer cultured pearls, you’re in luck: cultured freshwater and saltwater pearls are widely available, and in so many colors and shapes that there are pearls to suit a variety of tastes. (more…)

Famous Birthstones: Emerald – The Crown of the Andes

Emerald, widely regarded as the definition of green for hundreds of years, is the perfect color for spring. From the poetic description of Ireland as “the Emerald Isle” to the vibrant green of the famed gemstone itself—the May birthstone emerald has captured hearts and minds through the ages. (more…)

Famous Birthstones: Diamond

What makes a diamond famous? It may be its rarity or even its size. But more often than not, a diamond’s fame comes from its association with a person of historical influence. Learn about the world’s most famed diamonds, including those owned by the luminary Elizabeth Taylor, the British Royal Family, and the renowned Napoleon Bonaparte. With jewels such as these, April babies are honored to have the most beloved and sought after birthstone: the diamond. (more…)

Famous Birthstones: March’s Roosevelt’s Aquamarine

The hero of this month’s installment in GIA’s series on famous birthstones is the bluish-green aquamarine given to former First Lady Eleanor Roosevelt. The rough weighed a staggering 1.3 kilograms that yielded two gems when cut. The largest, a rectangular step cut stone weighing 1,298 carats, has an interesting political history. (more…)

Famous Birthstones: Amethyst – the Duchess of Windsor’s Necklace

GIA presents February’s famous birthstone: amethyst as featured in the Duchess of Windsor’s amethyst necklace by Cartier. While the Duke and Duchess of Windsor commissioned many jewels, this stunning amethyst piece has both a love story and historic resonance behind it. (more…)

The Culllinan II, a 317.4-carat rectangular cushion cut, is set into the Imperial State Crown. - Courtesy Time & LIFE Pictures/Getty Images
Famous Diamonds: Cullinan II

The Cullinan II is a 317.40 carat (ct) cushion cut diamond and the centerpiece of the British Imperial State Crown. Do you know the history behind this beautiful diamond? (more…)