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German Hand-Faceted Dyed Agate


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Dying Chalcedony, Agate and Onyx

first involves boiling the stone in a

strong bicarbonate solution, then soaking the stone in a

chemical solution.

Red: iron nitrate solution

Green: chromic acid or nickel nitrate

Brown: sugar solution followed by heat.

Blue: red or yellow prussiate of potassium followed by

soaking in iron sulphate solution

Black: sugar solution followed by suphuric acid.

examples of agate thats dyedpost-2434-128290650322_thumb.jpgpost-2434-128290647157_thumb.jpgpost-2434-128290646322_thumb.jpgpost-2434-128290611585_thumb.jpgpost-2434-128290610871_thumb.jpg

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