Suashish Diamonds, a leading diamond and diamond jewellery manufacturer is said to have taken an ambitious step in approaching Reliance Jewels and Tanishq to undertake manufacturing designer jewellery for the two jewellery retail chains. %% The venture, while diversifying the company’s potential, is also fruitful from the commercial point of view. According to the company, the margins in job-working are around 9-10 percent, whereas in branded jewellery sales it amounts to only 1-2 percent. %% The company is also developing expansion plans with an investment worth Rs.500 crore ($116 million).