20 Ct Emerald Cut Diamonds

Browse a vast assortment of 20 ct emerald cut diamonds for sale on 1stDibs. All of the items for sale were constructed with extraordinary care, often using Platinum, Gold and 18k Gold. Our collection of these items for sale includes 22 vintage editions and 4 modern creations to choose from as well. Our collection is diverse and broad-ranging, and pieces in stock date back to the 20th Century while others were produced as recently as the 21st Century. There are many different pieces in our collection of 20 ct emerald cut diamonds to choose from, but Art Deco and Contemporary 20 ct emerald cut diamonds are of considerable interest. Versions of these items have been a part of the life’s work for many jewelers, but those produced by Cartier, Cellini and Fine Jewels UK are consistently popular. A selection of emerald cut, brilliant cut and asscher cut can be found today on these pages. When shopping our range of 20 ct emerald cut diamonds, you’ll find that there are less available pieces for men today than there are for women.

On average, 20 ct emerald cut diamonds at 1stDibs sell for $42,500, while they’re typically $2,495 on the low end and $4,450,000 for the highest priced versions of this item.

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement rings, vintage engagement rings or Art Deco engagement rings. 

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.