Thank you very much. :)

The process is explained in this post here. The post goes into the full three way separation, but the calcination is covered as well.

The gist is that you strain your herb, heat slowly to dry alcohol and not cause a fire (especially if done with open flame), crank up heat once dry to burn down to black ash, crush ash, heat, crush, heat, crush, repeat till you get it as white as you can. Add the white ash to 5x volume distilled water (MUST BE DISTILLED or REVERSE OSMOSIS - all ions removed which might interfere with the minerals from the plant). Heat on low for 30 min, filter till clear. Evaporate water, scrape up crystals - repeat process until salts will whiten no more.

If you run into problems, let me know! ;) Some things take a bit of practice to really get down. And without proper lab equipment, it can be difficult to get the salts pure, so just do your best!