The gloss is done really well. It appears like the symbol is carved around the edges. Also it enriches the colors, giving more depth to the black. It's really cool overall. The name coincides with your DA id, which I hadn't noticed by now But why Sulfur? Is there sigils for all the elements?
Sulfur is generally associated with darker things, hell, for instance, which is probably just one of the reasons it is sometimes used as a Satanic symbol. It's mentioned in the bible, generally alongside fire (the whole 'fire and brimstone' line that some people use). I believe it originally was used in Alchemy, and is a hybrid of the infinity symbol and the Lorraine cross. I'm not sure if there are sigils for other elements, honestly. There very well could be.