Their products include the highly sought after Zircon sand...

Their products include the highly sought after Zircon sand (highly priced at around USD1,800/MT - price has increased twofold since mid last year, and the good news is the market is severely/acutely/critically in short supply of this minerals, factories have closed down due to inability to access this raw materials) and their heavily marketed Spherichrome (unique high quality Chromite sand priced around slightly less than half of Zircon's price)
The interesting characteristics of this Chromites is that it could replace Zircon sand in some of foundry applications thus addressing to the acute shortages of Zircon in global market.
They also have Ilmenite and other rare earths. But main focus is on their Spherichrome.

Information provided above is highly accurate and I put my life on it.
Sourced from the eunuch close to the IDM's emperor