DSC_1259_Ocean jasper cab destained
So after much advice and guessing by other lapidarists, I decided to go into full chemist mode, and went with a destaining-type protocol, and bumped up the concentrations and gradually increased the polarity of solvents. In the end, I went with 90% isopropanol and 10% glacial acetic acid. After three weeks, I'd say I'm 99.5% of the way there. There is still a bit of pink, but at this point, you have to look for it.
As a bonus, the druzy areas cleaned up nicely as well.
DSC_1259_Ocean jasper cab destained
So after much advice and guessing by other lapidarists, I decided to go into full chemist mode, and went with a destaining-type protocol, and bumped up the concentrations and gradually increased the polarity of solvents. In the end, I went with 90% isopropanol and 10% glacial acetic acid. After three weeks, I'd say I'm 99.5% of the way there. There is still a bit of pink, but at this point, you have to look for it.
As a bonus, the druzy areas cleaned up nicely as well.