Blue Mountain Jasper is considered to be one of the premium jaspers that has been a long time favorite with the lapidary community.  Known for its blue-green/gray orbs, it is a very hard material that takes a superior polish.  It also comes in other shades, mainly brown, purple and olive, and makes exquisite show pieces and finished cabs.   

Origin:  Oregon, US

Dimensions:  5" x 3.5" and approximately 7 mm thick.  Weight = 141 grams.

 Shown wet.  Not polished.  Flaws are shown as white lines in the final picture frame.