Roberto Coin Granada

In his debut Appassionata collection in 1996, Italian designer Roberto Coin (b. 1944) made the ruby a core element of his designs. Inspired by ancient Egyptian and Burmese traditions of wearing a ruby against the skin as a talisman of love, joy and protection, Coin set a small ruby on the inside of his necklaces, rings and bracelets. The hidden ruby became Coin’s signature as he launched his brand as a groundbreaking innovator in quality Italian craftsmanship.

Coin’s talent lies in working with precious metals and creating unexpected designs by combining white, rose and yellow gold. Coin was initially a successful hotelier before leaving that career to pursue his passion for jewelry. Although he was born in Venice, Coin chose to set up his studio in Vicenza, Italy. Known as the “City of Gold,” Vicenza is the heart of the Italian gold and jewelry industry, boasting over 700 years of goldsmithing heritage.

Coin was interested in bringing new technology into Italian jewelry manufacturing, such as using machines originally intended to weave metal for car exhaust pipes to spin the gold wires for his jewelry. Coin’s brand produces hundreds of unique and limited-edition jewelry pieces every year and draws inspiration from the great Italian craft traditions as well as art, history and mythology.

Along with the signature ruby, the Appassionata collection’s most enduring legacy is the masterful fabric-like texture of the woven threads of gold. The technique of interlocking gold links that characterizes this series creates a beautiful basket weave that strengthens and elongates each piece’s life, rendering the accessories robust heirlooms. Coin’s other collections continue to offer innovations in design, from Classica Parisienne contributing to the trend for stacking white, rose and yellow gold together to Pois Moi involving square shapes and hand-etched and -carved details.

Find a collection of Roberto Coin rings, bracelets and other jewelry on 1stDibs.

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.