Osia International

Osia International is a Hong Kong–based fine jewellery manufacturer and diamond trader established in 1992. With production facilities in Hong Kong and China, our company offers a wide range of diamond and colorstone jewellery—spanning bridal, solitaire, fashion, and men’s collections—crafted in various gold and platinum alloys. Osia also deals in certified and non-certified loose diamonds from 0.30 to 10 carats, specializing in GIA/IGI/HRD stones. Our clientele includes global chain stores and boutique designers, with a strong emphasis on quality, craftsmanship, and competitive pricing.