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GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

GIA Celebrates Birthstones – The Citrus-Colored Citrine

November’s birthstone, citrine, comes in the colors of citrus fruits, ranging from deep reddish orange, reminiscent of Madeira wines, to pale and saturated yellow hues. In fact, its name is derived from the French word “citron,” which means “lemon.” Citrine’s optimistic colors bring to mind the warmth of mid-day sunshine. (more…)

GIA Celebrates Birthstones –Tourmaline, the Chameleon of Gemstones

Tourmaline, the October birthstone, comes in almost every color of the rainbow. The most popular varieties range from rich reds, pinks and peach colors, to emerald greens and yellows, to blues and violets. (more…)

GIA Celebrates Birthstones – Opal’s Fiery Play-of-Color

Opal, October’s birthstone, is a captivating gemstone because of its unique optical characteristics. Opals often exhibit a spectrum of colors called “play-of-color,” when viewed from various directions. The Roman naturalist, Pliny the Elder, referred to opal’s play-of-color in the 1st century AD when he wrote: “For in them you shall see the living fire of ruby, the glorious purple of the amethyst, the sea-green of the emerald, all glittering together in an incredible mixture of light.” (more…)

GIA Celebrates Birthstones – Sapphire, Token of Loyalty

September’s birthstone, the sapphire, is known for its various shades of blue, however, these gemstones come in every color of the rainbow. A red sapphire is actually a ruby, the September gem’s sibling. Both of these gems are made from the durable mineral corundum. The rare pink orange variety known as padparadscha is especially prized, named after the color of a lotus flower. (more…)

GIA Celebrates Birthstones – Peridot, the Gemstone Born From Fire

Peridot, the August birthstone, is the gem variety of the mineral olivine. Instantly recognizable with its distinctive lime green color, peridot is known as the “extreme” gem because it is only found in harsh conditions. It is mined from rocks created by volcanoes and even found in meteorites that fall to Earth. (more…)

GIA Celebrates Birthstones – Ruby, the King of Gems

Ruby, July’s birthstone, has been esteemed since ancient times, even mentioned in the Bible as one of the gems used to represent one of the 12 tribes of Israel. (more…)

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…)