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GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

November Birthstone: Where Do Topaz and Citrine Come From?

Born in November? Lucky you! Your November birthstone is not one, but two beautiful gems: One offers a rainbow of colors; the other is famed for its rich yellows. Make choosing easier by learning more about them, including where they come from.
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Warding Off the Evil Eye with Jewelry and Gemstones

Scoff at the evil eye? Belief in this ancient curse is still widely held. While we can’t support the idea scientifically, we do love the gems and jewelry thought to offer protection against the malevolent look believed to cause sickness, poverty and even death. (more…)

Moonstone: A Gem to Celebrate the Moon

According to Hindu mythology, moonstone is made of moonbeams! And it’s easy to see why so many cultures also associate the gem with moonlight. Read on to learn all about this remarkable gem, including what gives moonstone its other-worldly glow. (more…)

Black Diamonds: What You Need to Know

From cast-asides to starring roles, black diamonds have taken quite a journey. They’re even vying for position as center stones in engagement rings! But it pays to look beyond their unique appearance to learn more about this enigmatic gem. (more…)

A Look at First Lady Nancy Reagan’s Jewelry Collection

Explore Christie’s auction of “The Private Collection of President and Mrs. Ronald Reagan” to learn more about the jewelry and style of Nancy Reagan, one of America’s most well-known first ladies. (more…)

October Birthstone: Where Does Opal Come From?

Opal’s kaleidoscopic hues have delighted us for centuries. Loved for its spellbinding play-of-color, this October birthstone seems to be a bit magical and mysterious. Get ready to find out where it comes from – and how it forms. (more…)

The Emerald Cut Engagement Ring

Sleek, elegant and beautifully understated, an emerald cut engagement ring is a great choice for someone who’s romantic and sophisticated. If you’re looking for diamond engagement ring inspiration, read on! (more…)

What Is a White Diamond?

Colored diamonds have been smashing sales records at auction houses the past few years, but here’s one that hasn’t gotten a lot of press: the white diamond. Yes, white! Get ready to fall in love with this remarkable beauty. (more…)

The Many Colors of Sapphire

Sapphire is famous for its rich blues, but it also comes in a rainbow of colors: violet, green, yellow, orange, pink, purple, grey, black, brown, and delightful combinations called “parti-colored”. (more…)

September Birthstone: Where Do Sapphires Come From?

Sapphire is a popular gemstone – and comes in a rainbow of colors. It’s also been long prized, from Ancient Greek rulers to the clergy of the Middle Ages. But where does the September birthstone come from? (more…)

Wedding Anniversary Gemstone List: Years 21 – 60

A wedding anniversary is an occasion to shower your loved one with a special gift – and there’s nothing more precious than gems and jewelry! Rich in meaning, they symbolize the virtues that have made your marriage beautiful and lasting. (more…)

Art Deco Engagement Rings: How to Get the Style

Art Deco engagement rings recall an era of glamour and sophistication: elegant and timeless, this ring style is trending! Find out how to pick the right diamond shape, metal and more to create this style for your own engagement ring. (more…)