Ann: Four Lulo Diamonds Fetch US$17M (A$26M) at Tender, page-19

The market understands the value of these stones will not reflect the average $ per ct for any kimberlite.

$2000 per ct is the expectation for a kimbo at kulo. At 2cpht, that's $40 per tonne.

This is extremely low compared to other hard rock minerals where mining costs are similar

brown coal averages about $50 per tonne, and black coal $100 per tonne.

for gold, it would be equivalent to a 1g/t grade, which hardly excites anyone. A 10g/t gold grade generates $500 per tonne.

then don't get me started on lithium spod where 1% li2o content is about $500 per tonne, 6% is about $3000 per tonne

this is why the market doesn't care.