Designed by Jacob & Co jewelers, this 18K gold Turntable Ring features an arrangement of black and white diamonds that make up a tiny turntable. The accessory could be a good one for a musician or a music lover, but at $12,900 it's probably going to end up adding some bling to the hand of a DJ or used as an engagement ring on an appropriate reality show.

[via Born Rich]

Heidi Klum may have her name on a line of Birkenstocks, but she isn't completely giving up glamour for hippie-chic. She also has a line of fine jewelry with Mouawad, inspired by a clover symbol that she first saw at the Duomo in Milan, which she found to be elegant and timeless - the perfect symbol for a line of jewelry. The Heidi Klum Collection includes earrings, rings, necklaces and bracelets that all feature the signature clover pattern and range from simple sterling silver pieces to elaborate white gold and diamond creations. There is a full list of the stores that carry the line on Heidi's website.

While the size of this picture is a little unusual for Luxist, there is no other way to showcase the tremendous amount of detail that went into the construction of this piece. The Twin Towers was designed by Nayna Mehta in memory of those who died in 9/11 and to commemorate the 100th anniversary of the JA New York Show, which began this week. The Towers has an 18K gold base and 14,080 diamonds decorating it, for a total weight 255 carats. Overall, 38 designers and technicians were involved in putting the piece together, all after trying to find diamonds of the proper quality and weight demanded by the designer. Eventually, Mehta intends to sell the piece and will donate a portion of the proceeds to victims from the collapse of the World Trade Center.

Our friends at Autoblog found a company that produces "the perfect fusion between sport and jewels." The company is called Circuiti and, with designer Gianfranco Quartaroli, they make jewelery in the shape of internationally known motorcycle and auto racecourses.

Each piece in their collection can be made of steel or of gold, and are available with diamonds and without. A diamond is a popular way to mark the starting point of the course. The steel option might be the best choice of adornment for an everyday key chain, but the tracks set in gold with diamonds or other precious stones are the flashiest way for a fan to support his (or her) team. The stones can even be chosen to ensure that your pendant or cuff links will reflect your team affiliation. Prices start at around €64, depending up course and materials.