CIEN, a company based in Thailand, is renowned for the streamlined production of premium-quality gemstones and diamonds calibrated regarding a strictly accurate standard, along with a diversified range of exquisite pieces of jewellery specifically for luxury brands. We offer a one-stop service solution encompassing your specific needs, from procurement of rough stones through delicate craftsmanship of facet placement and jewellery creation to optimal specification control with transparent and sustainable practices.