"The second key consequence of higher grades is that it allows...

"The second key consequence of higher grades is that it allows for the production of a premium product, which is a significant advantage in any market, but particularly with respect to graphite. Higher-grade product is always in strong demand, attracts a higher price, and helps insulate producers from price shocks. Lindi test-work has demonstrated the ability to return favourable ratios of the high-value larger graphite flakes with up to 50% of the total graphite in concentrate in the Super Jumbo (+500μm) and Jumbo (+300μm) categories. The Lindi Jumbo Graphite Project boasts up to 74% of natural flake sizes above 180 μm. The premium products produced could allow WKT to negotiate higher than average prices – as general natural flake graphite product is smaller than 180μm."
https://www.sharecafe.com.au/2019/03/08/lindi-dfs-update-sends-walkabout-shares-on-the-run/