Middle and high grade. There are many gold styles of crane diamonds, which are fashionable and cost-effective. Crane Diamond belongs to the middle and high grade in China, and it is a second-line brand in the jewelry industry. It is also the first professional jewelry brand engaged in e-commerce diamond sales in China. Crane (Kelan Diamond) is a China custom wedding ring and luxury diamond jewelry brand. Founded in 2007, Kelan Diamond is a wholly-owned O2O jewelry brand under Gangtai Holdings, a comprehensive enterprise group in the jewelry industry chain of internet plus, China.