From Bloomberg:
The world’s first diamond futures exchange will begin trading in India on Monday, enabling companies in the largest producer of the cut and polished gems to better hedge price risks.HT: Alpha Ideas
“Indian manufacturers most require this type of financial product,” said Sanjit Prasad, managing director of the Indian Commodity Exchange Ltd. India carries the price risk of holding huge inventories of cut and polished and rough diamonds, he said.
The exchange, backed by companies including Reliance Capital Ltd. and MMTC Ltd., will start trading in 1 carat/100 cent contracts and will eventually add 50 cent and 30 cent contracts, he said. The futures, two-and-a-half years in the making, followed talks with the Ministry of Finance and the Securities and Exchange Board of India, Prasad said....MORE
I guess they've answered the question asked in 2012's "Paper Diamonds: How Do You Standardize Rocks So They'll Fit Inside An ETF Wrapper?"