Origins and Rarity
Diamonds were first mined more than 2,400 years ago in India. Now, diamonds are both found naturally and created in labs. Natural diamonds form when carbon atoms are exposed to intense heat and pressure deep in the mantle of the earth, causing them to crystallize.
Diamonds are not the rarest gemstone, but their clarity, color, carat and cut combine to make them truly exceptional and deeply treasured.
Natural emeralds are much rarer than diamonds. The mesmerizing green stones are found mostly in South America, with the majority of emeralds coming from Colombia. Emeralds can also be created in a lab, resulting in stones that are often clearer than a natural emerald.
Appearance
From the different ways they glisten, to the colors of the stones and the elements of their clarity, emeralds and diamonds are quite different.
Sparkle
Diamonds are famous for their sparkle and fire, as they refract light into a shimmering rainbow of hues.
Emeralds, on the other hand, don’t reflect the light as much as diamonds do. Instead, they look luminous as the light hits them and creates flashes of captivating green tones.
Color
The
color of a gemstone is, perhaps, its most striking quality. Diamonds are renowned for their brilliant clear look, but there are many color options to choose from, including green diamonds. These tend to boast a more translucent green tone that promises the classic diamond sparkle along with a dazzling color.
Emeralds are always green, but these vibrant gems exhibit a wide range of shades within this color family. An emerald’s color is described using three categories, tonal grade, hue and saturation.
Tonal grade refers to how light or dark green the emerald is, and can range from Very Light to Very Dark, with higher quality emeralds usually in the darker tones. The hue describes what kind of green coloring the emerald possesses, such as a yellowish-green or bluish-green. The saturation describes the intensity of the color of the gem.
Clarity
A gemstone’s clarity is a key point to consider when buying fine jewelry. Diamond clarity is officially graded using the Gemological Institute of America’s clarity scale, which ranges from Flawless to Included. Most diamonds fall into the SI, Slightly Included, or VS, Very Slightly Included categories, meaning most inclusions are only visible under 10x magnification.
Almost all emeralds have inclusions, including gas bubbles and minerals that were trapped during the gem’s formation and fissures that occurred naturally while it was being formed. In fact, inclusions are part of an emerald’s allure. An emerald’s one-of-a-kind inclusions are called its jardin, French for garden, and its clarity can range from softly cloudy to almost clear.