Friendly Diamonds is a New York City-based jewelry brand specializing in certified lab-grown diamonds and fine jewelry. Its collection includes engagement rings, wedding and other rings, earrings, bracelets, necklaces, pendants, and loose diamonds. Customers can create a custom design by choosing a setting and then selecting a diamond, or start with a diamond and choose a setting; certified colored diamonds are also available. The site features ready-to-ship and in-stock pieces alongside pre-designed styles, with options organized by diamond shape, color, carat size, and precious metal, including white, rose, and yellow gold and platinum.

Beyond engagement jewelry, the range includes tennis bracelets, stud and hoop earrings, and solitaire, fashion, and initial necklaces. Friendly Diamonds offers resources such as an engagement ring guide, information about lab-grown diamonds and certification, and a quiz to help customers explore ring choices. Customers can get in touch by phone, chat, or email, or book an appointment. The brand advertises free shipping, 30-day returns, and a lifetime warranty.