Not only for prized tanzanite and
tsavorite used in jewelry, but also for hosting a suite
of other minerals increasingly prized by mineral collectors.
I used the current mid price
of 9.625 p. I also assumed no dividend payouts over the next 5 years (although I suspect they will re-commence) and like you I conservatively haven't added any additional turnover / profits for possible
Tsavorite and or other gem sales.