In May, the company obtained a judgment for damages of $1.3 million in a lawsuit filed against an alleged infringer in federal court in Manhattan. The case was filed against Jay Friedman, who did business as RealImposters. In June, the company settled a case against Sam Moon out of court for an undisclosed sum, according to company statements.

One of the most watched jewelry lawsuits in recent years is Tiffany's pending lawsuit against eBay. The case, originally filed in 2004, has been closely followed by jewelry and apparel brand holders for its potential to set precedent regarding infringements online. The lawsuit is set to go to trial in October.

"We all have a common goal here," said Yurman's Blum. "We think it's extremely dangerous for the brand, the business and the industry. We're going after these guys."