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GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

GIA Celebrates Birthstones – Will Pearls Bring You Mental Clarity?

Most gems form within the Earth, but June’s birthstone, pearl, is unique because it is formed in the soft tissue of a living mollusk. Natural pearls are rare; most are cultured by implanting a bead into the mollusk and letting the mollusk coat the bead with nacre for up to two years before the pearl is harvested. (more…)

GIA Celebrates Birthstones – Emerald, May’s Birthstone, Inspires Joy

Emeralds, the birthstone for May, have been beloved throughout human history, evoking rebirth, renewal and spring. The word “emerald” comes from the Greek word “smaragdos,” which means “green stone.” Variations of this rich green color suggest soothing, lush gardens. (more…)

GIA Celebrates Birthstones – Diamond, the Invincible Gemstone

Diamonds, from the Greek “adamas” meaning invincible, are the hardest of all gemstones. April’s birthstone is formed deep within the Earth and reached the surface through violent volcanic eruptions. (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…)

GIA Celebrates Birthstones – February’s Empowering Amethyst

Amethyst is the purple variety of quartz that has captivated mankind for centuries. Its lilac to deep purple hues can be cut into many shapes and sizes, and can also be manufactured in a lab rather than mined. (more…)

GIA Celebrates Birthstones – Are Garnets Always Red?

Garnet, January’s birthstone, is one of the most diverse gemstones. It comes in an extraordinary range of color, although it’s most commonly known for its rich shade of red. In fact, the name garnet is thought to be derived from the word pomegranate, because the more commonly found deep red varieties of the gemstone resemble pomegranate seeds. (more…)

All About Birthstones: Tanzanite in December

Tanzanite, the December alternate to turquoise and zircon, was not discovered until 1967, so it is a relative newcomer to the list of birthstones. It is named for the one country on earth where it is currently found: Tanzania, in eastern Africa.  Although discovered by others, Tiffany & Co. deserves the credit for naming the gem and popularizing it beginning with a big publicity campaign in 1968. (more…)

All About Birthstones: Topaz for November

There are two November birthstones that command the attention of consumers and gem connoisseurs alike – topaz and citrine. In this post, we’ll discuss topaz, a gemstone that is widely cherished for its array of colors and distinctive look. (more…)

October Birthstone: All About the Tourmaline

October babies have the pleasure of enjoying two birthstones to commemorate their birthdays –tourmalines and opals. This post is all about the October birthstone, tourmalines. (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…)

August Birthstone: Peridot, from Earth or from Space

Hailing from the olivine group of minerals, the peridot is a mysterious and thought-provoking gem. Peridot was valued in many ancient and medieval cultures, first in the second century BC in priests’ jewelry and later in the chalices and churches of medieval Europe. Peridot has also been used for centuries as a protective talisman, shielding the owner from evil spirits and “terrors of the night.” (more…)

July and the “King of Gemstones” – The Ruby Birthstone

Few things catch the eye like the ruby birthstone. This July birthstone has a color which can be described as a deep, pure, vivid red. Ruby, a variety of the mineral corundum (which also includes sapphires), is as historically captivating as it is beautiful.

In the ancient language of Sanskrit, ruby is called ratnaraj or “king of precious stones” for its rarity, hardness (second only to diamond), beauty, and for its seemingly mystical powers. (more…)