STARTED five years ago, it tracks polished diamond prices globally, and appears on Bloomberg and Reuters trading screens. It is the first index to use actual transactions as opposed to ‘asking’ or ‘best’ prices, and is based on unique production models.%%PolishedPrices said that this agreement was an important step towards creating financial products in diamonds. ABN AMRO has expertise in derivative trading and a strong presence in global financial markets. The two institutions will be targeting investors as well as with diamond companies seeking instruments for hedging production and trading.