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Just about to attempt heat treatment of Ratanakiri Cambodian brown/coke cola zircon. Anyone experienced this process. I have an electric kiln and purchased some graphite crucibles for the exercise. Aim is for a traditional brilliant sky blue.

About to start building a mineral jig. Aim to have two cels, each around 400x400mm square, pulsed by a rocker system from below using two 12 or 13" tyres. Just wondering if anyone has any design rules, pulse frequency and stroke range, ragging and mesh sizes etc etc. Plan to use it for...

Just signed up. Looks like an awesome forum. Well done to all past contributors. I am Gold Coast based. Interest and experience in Gold Detecting - WA and a little bit in the golden triangle. Gold dredging in the 80's and 90's. NSW north and soutgern tablelands Gem fosicking and and very...