I bought this bracelet at a boutique in the 70s and was told that it was serpentine. I'm preparing to sell it and need to state what kind of stone it is. Looking at photos online, it looks like serpentine is generally more yellowish. This is very dark green with white-ish flecks throughout. It is completely opaque, not translucent at all. I took it to a local jewelry store that sells natural stone jewelry and they weren't sure, either, but guessed that it was a type of jasper. Any help appreciated!! Thanks.