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Independent diamond industry analyst Paul Zimnisky has launched the Zimnisky Global Rough Diamond Price Index. Its aim is to consolidate reliable rough diamond price information and publish price changes in rough diamonds on a weekly basis.

Independent diamond industry analyst Paul Zimnisky has launched the Zimnisky Global Rough Diamond Price Index. Its aim is to consolidate reliable rough diamond price information and publish price changes in rough diamonds on a weekly basis.
Another goal of the index is to create transparency in the diamond industry, where price information has historically been somewhat opaque. Zimnisky states on his website:

Given the highly concentrated state of the diamond mining industry and the relatively opaque nature of rough diamond trading, reliable, easily-assessable indicative rough diamond price information has historically been difficult to source. The intent of the Index is to track, analyze, and disseminate current aggregate rough diamond price fluctuations for use by investors and traders of diamond mining equities, analysts, and a range of diamond industry participants.
The proprietary index methodology incorporates rough diamond transactions via long-term contract, tender, and auction sold through commercial miners. The Index includes a minor sensitivity (currently <8%) to polished diamond prices (using internet diamond retailers that sell loose stones as a proxy) given that miners utilize the polished market as a factor when determining contract pricing of rough. The Index also includes a minor sensitivity (currently <8%) to stand-alone diamond mining equities, as the relative liquidity that equities provide can imply the current profitability and revenue generation ability of diamond miners which is directly influenced by current rough prices. Both polished diamonds and diamond miner equities have a symbiotic relationship to the price of rough and add implied rough diamond price information to the Index.

Click here to view the Zimnisky Global Rough Diamond Price Index.

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