The classical Afghani lapis is so variable as to quality that I
would not approach valuation unless I had a lot of confidence in what
I might get for it. Ergo, why not approach the decision from the
standpoint of projecting what you might get for it upon resale.
Oddly enough, that which has sprinklings of pyrite is sometimes
considered defective in some European venues. Personally, my choice
is with the electric blue that has pyrite. This is material that I
would value by the carat.......there is damned little of it! Any way
you look at it, the stuff has to be carried out of it's 14,000' perch
on a jack ass and then only when the snow has melted.......just being
able to get the stuff is worth a lot !
Ron Mills at Mills Gem Co. Los Osos, Ca.