Vintage necklace

I finally tried my hand at oxidizing metal, and here is the result: the Priscilla necklace. I used the brass skeleton key charm I got a while back as the focal point. The circle pendant that the charms are hanging from was hand-forged using 16g sterling silver wire, but oxidation came out a little unexpectedly. Instead of a gunmetal color, the liver of sulfur gave the pendant a bluish/greenish patina. After a while I decided it actually sort of matches the verdigris on the key, so even if the results were a little unexpected, I kept it as is. I'm not sure if the blue/green color was a reaction to the soldering process or to the copper tongs I used (does anybody know if copper reacts with liver of sulfur?) but, it worked out in this case.