Tantalum and Niobium are not exchange-traded products and thus no ‘official’ pricing benchmark exists. However, several data services offer up-to-date pricing which has become the unofficial benchmark in the industry. They obtain market information by communicating regularly with a large number of buyers (smelters) and suppliers to get an actual understanding of supply and demand situation and the current prices materials are trading at. Some of the better-known data providers are:
In July 2020 Metal Bulletin / Fastmarkets announced that had launched a pricing assessment for Tantalum based on the following specifications.
Tantalite, basis min 25% Ta2O5, cif China
Quality: Lump 0-10mm grain concentrate; Ta2O5 25% min; Nb2O5 15% min; U3O8+ThO2 0.10% max
Quantity: Minimum 10-tonne lots
Location: CIF main ports China
Unit: USD per lb Ta2O5
Chart Source: https://roskill.com