Well, first step would be to be sure of what you have in the first
place! If it’s a metallic stone, a golden color might indicate iron
pyrite, and the color is not an oxidation product, but the natural
color of the material in that form. Marcasite would be more of a
silvery color, and I don’t think you can change one to the other.
Limonite is a hydrated iron oxide, and it is more earthy than
metallic, and is yellow. Can’t do much with it at all. A sturdier form
would be ironstone, as in boulder opal matrix… but that’s reddish
brown rather than yellow or golden.
Jaspers can come in gold and yellow tones, so can agates. Agate can
have rutile inclusions… So… the answer is… it all depends! :>
Seriously, can you describe the material a little more? Is this rough
material, cut, crystalline, metallic, or something else??
| Carol J. Bova @Carol_J_Bova |
| The Eclectic Lapidary e-zine |
| http://www.bovagems.com/eclectic/ |