This following link is informative - GEM seem to run at around 15.7 carets per tonne overall based on reserve estimates.
http://corporate.gemfields.co.uk/assets/montepuez-ruby-mine-mozambique
But info on grade varies, but seems to well above 10 carets per tonne.
"Overall, the recovery rate for the primary deposit is around 162 carats per ton, while the secondary deposits produce 31 carats per ton. The figure for the secondary deposits includes only processed gravels and not the amount of overburden topsoil moved."
Their initial auction in 2014 raised USD33.5 mill, they have a similar capacity wash plant.
"Gemfields’ first Mozambique ruby auction took place in Singapore in June 2014, and marked a milestone for the global ruby trade. The Gemfields operation offers an opportunity to expand the consumer base for responsibly sourced, consistently graded, and reliably supplied ruby. The US$33.5 million revenue generated by the inaugural auction put the spotlight on the world’s largest ruby deposit, located in Montepuez, Mozambique."
Prices :
From Dec 2015
http://www.diamonds.net/News/NewsItem.aspx?ArticleID=54150&ArticleTitle=Gemfields Achieves Average Price of $318/ct at Ruby Auction
"The company achieved an average price of $318 per carat, selling 90,642 out of 92,136 carats, or 45 out of 49 lots, according to a Gemfields statement December 21. It sold 98 percent by weight and 95 percent by market value. The stones were extracted by subsidiary Montepuez Ruby Mining Limitada."
And nice link about GEM with a video
http://corporate.gemfields.co.uk/assets/montepuez-ruby-mine-mozambique
So GEM seem to have been doing quite nicely for a few years now - all signs point to the MUS doing at least as well and quite soon.
Thus the MUS market cap looks like it has a bit of room to grow now that they have actually bulk sampled, shipped first product and commissioned the plant going into full production - I expect some significant value sales within six months, maybe even three.
We have not even started to talk about the Syrah like graphite prospect yet, the JORC is due out some time this quarter.