What have I been cutting the last couple of days?

I'm super curious too! Looks cool. No help here but happy to gawk!

Man...if you were only three areas over from where you found it, I would say it was petrified prehistoric Alien dung!

No clue on what it is...but it looks like a "mottled" jasper of sorts. I'm curious if Sabre52  or Bravura Cabochon Designs might recognize it.

Whatever it is...it's gorgeous...and it's the second "yard rock" posted this week that really looked like something special!

Thats a really cool rock! Wonder if rmf would have an idea or vegasjames.

Your probably right.  I don't notice any "silk" look on the outside of the rock, but the blue/grey areas just seem to react differently when you get water or oil on them.  They just look like they could be fibrous.  In the OP I said they kind of looked like small dendrites.  Kind of fun to look up crocidolite and read that its the most dangerous mineral known to man.   Proper precautions are being taken.  Thanks so much for the info.

I don't say this to diminish your rock but yeah it's a common northern CA "Franciscan assemblage" tortured rock with a mishmash of colors and minerals. I call it dirty jasper because it's typically accompanied by a lot of hematite as I think I see in your last slice photo. I see a lot of this type of rock on the far northern area of the Franciscan - around Stony Creek/Burris Creek.

Once in a while you cut a piece and there is just wild stuff going on like in yours. Your second photo looks like it tried to be a poppy jasper but just had too much going on. As a point of reference Morgan Hill is only like 30 miles away as the crow flies.

Yeah Tommy, I can definitely see the similarity. Unfortunately this rock acts the opposite of typical and photographs better than it looks in real life. It's really dark. I don't take your comments as diminishing my rock. It's just something I found laying in a field. I would have never associated this with anything close to poppy jasper but what you're saying makes a lot of sense. I know a lot of rocks were hauled in and dumped in Area 54 but I doubt any were hauled very far. I knew it was closer than it seemed to Morgan Hill. When I was over at Clear Creek last time I thought about driving home the back way, through Mercey Hot Springs but thought better of it as it was getting too late. It doesn't look like anything else Ive found there (and I've got a bit of stuff from there) But I have found some other one offs too.