I found this at Kilbourne Hole in NM. It is entirely different from anything else I found there. Peridot is the main collectible at that location; you can hardly take a step without walking on some. Facet grade stuff is rare, however, as most peridot "bombs" from Kilbourne are composed of rock-salt sized grains of peridot packed together in a basalt shell. These bombs can be cracked open like an egg causing the peridot grains to come apart into a pile. Anyway, the piece I found is striated rather than granular, and is darker green than most peridot. Any help identifying what it is will be appreciated.

I'm not sure if there is another way to attach images, but when I click on the link at the bottom of the message, the image loads and appears. Is anyone else not able to see the image?

JoeM wrote on Jan 22^nd, 2017 at 10:36pm:


Yes, jeepcj779 I'm able to click on and view your photo.  Sorry Joe not sure whats up with your PC.  That's a beautiful rock you have.  It looks almost like glass slag or volcanic glass.

Original photo again.

Thanks, but collecting was not difficult at all. One rap with the rock hammer and most of the peridotite/olivine xenolith "bombs" fall right apart. I had to open a couple hundred to find the good stuff, but you can hardly take a step without finding something interesting.