Voskop has a high grade zone more than 1.2km in total length. This has produced high TREO results, with some samples at around 1% TREO and an average of 0.42% TREO. HREOs and Ytrium Oxide make up around 18.8% of TREO, with 0.2% Niobium and 0.045% Tantalum. Voskop also has high Zirconium grades, averaging 0.87% ZrO2 (Zirconium Dioxide), with some samples above 2% ZrO2.