Dekan

I've been doing some more internet searching since I posted this. I'm wondering if the rock might be serpentinite. Serpentine rock & soil is very common in my area (although usually more green and less gemmy than this stone). Evidently serpentinite can contain magnetite, which would explain why it is pretty strongly magnetic. This photo (admittedly of a mineral from the Italian alps) looks remarkably like my rock: https://www.alexstrekeisen.it/english/meta/serpentinite.php Curious to get the perspective from experienced mineralogists. I'm worried I am "wishin

Hi, I'm a new forum member and a newbie when it comes to minerals, so I'll apologize in advance if I don't provide sufficient information or use incorrect terminology. I found this stone in my yard in Portola Valley, CA. I'm pretty sure it did not end up there naturally since I've never seen any rocks like this in the San Francisco Bay Area. It stood out to me which is why I grabbed it. The rock is about 7" long It appears to be a dark, grayish green in color If you look closely it appears somewhat composite kind of like a granite It has a "gemmy" quality to it in th