Indo Sino Co. is an established trader of GIA-certified and loose diamonds for the past two decades. Founded in 1997, we strive to offer to our esteemed customers a wide range of products of various colour and clarity. In particular, we specialize in diamonds from 30 points to 5 carats up, with colours from D to M and clarities of all ranges. With strong distribution network over America, Middle East and South Asia, at Indo Sino Co., we are endeavored to provide you with a widest possible range of available diamonds for your selection.