Boucheron Animal Ring

This deep red gem is the color of heat and passion — vintage and antique ruby jewelry is perfect for those born in the middle of summer.

Rubies are one of the few gemstones that can give diamonds a run for their money. Just consider the Van Cleef Arpels “scarf” necklace the Duke of Windsor presented to the Duchess on her 40th birthday, in 1936 — set with diamonds and dripping with rubies, a testament to the deep-red gemstone’s power — or the slippers encrusted with 4,600 rubies that Harry Winston made to commemorate The Wizard of Oz’s golden anniversary. July babies have permission to adorn themselves with this beautiful red stone even when it’s not their birthday.

Rubies are considered precious stones — along with diamonds, sapphires and emeralds — and have a hardness of 9.0 on the Mohs Scale, surpassed only by Moissanite and diamonds. They are composed of corundum, a colorless mineral that is also the basic material of sapphires. In the July birthstone, the red of the gemstone — and the various hues seen in sapphires — are produced by the presence of trace elements. In the case of a ruby, this element is chromium. Rubies range in color from vermilion to a violet red. They are also pleochroic, which means that a stone’s hue can vary depending on the direction of viewing. The most sought-after color is pigeon’s blood: pure red with a hint of blue.

Rubies that are hosted in dolomite marble are the most prized: Because the marble is low in iron, so are the rubies, resulting in a more intense color. Rubies found in basalt, which has a higher iron content, are generally darker and less intense.

When shopping for antique and vintage ruby jewelry, remember that the 4Cs of selecting the perfect diamond — color, clarity, cut and carat — also apply to rubies.

According to the Gemological Institute of America, the color of the July birthstone should be a vibrant to slightly purplish red, and the stone should be clear and inclusion-free. Accordingly, the cut should show off its color and clarity. As for the last criterion, fine rubies more than a carat in weight are rare. Often, large rubies are more expensive than diamonds of comparable weights.

Find a collection of ruby necklaces, ruby rings and other accessories on 1stDibs.

Throughout history, people have worn rings as symbols. They represented wealth and power for kings. Rings, whether fine jewelry or vintage fashion rings, have been given as gifts to mark significant occasions and accomplishments in life. They are also seen as a sign of love when worn on a certain finger.

For enthusiasts of costume jewelry, which is typically designed to accessorize with current fashions and made of inexpensive materials, there has been no shortage of coveted rings created over the years by the likes of J Dauphin, Miriam Haskell and others. A range of fashion rings created in ceramic or embellished with rhinestones — the latter a source of instant, affordable glamour — have also been designed at Chanel. The founder of the internationally revered luxury house, Gabrielle “Coco” Chanel, loved costume jewelry but couldn’t resist designing jewelry with diamonds.

Signet rings are one of the oldest types of rings. They often have a family crest or seal engraved on the ring that the wearer can imprint into melted wax. Although most people don’t use wax seals anymore, signet rings are an enduring style.

The type of metal chosen for a ring is an important factor in its design. Gold is a classic choice for fine jewelry, and, for costume jewels, gold offers a range of hues that includes yellow gold, white gold and rose gold. Platinum is becoming a popular choice for its elegance. For fashion jewelry lovers, silver rings remain a must-have accessory, particularly those embellished with turquoise or coral.

A stone can add a pop of color or allure to a ring. Many people choose to wear rings featuring their birthstone. Diamonds are popular with those seeking the perfect engagement ring (a search that can prove intimidating), and they also make beautiful fashion rings, from solitaire rings with single stones to rings with groups of stones.

Zircon rings are similar to diamonds and come in various colors. Some rings feature a large stone surrounded by smaller stones in a halo. They can all be the same stone, or they can have different stones to include more colors.

Fashion rings are an easy way to add jewelry to any outfit. Find a collection of vintage fashion rings on 1stDibs that have glitz and glamour to match your style.