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Yes, and some crystals need to be coated before you add the graphite paint because they do not like the sulfuric acid. Lapis Lazuli, Apatite for small examples hate acid. and Citrate needs to be coated or the sun will turn it white. I think of the crystals being in a cave without direct light and we bring them into the light without sunscreen. Other coatings look fake this stuff is thin and tough.
Electroforming JewelryView Instructable »
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