no, these particular pieces come from Australia, that is all i remember from the conversation i had with the dealer when i bought this in Missouri over the summer. my searching was based on that, which brought me to conclusion that it is most likely chrysoprase. its not malachite. i am only 100% certain it is not because i specifically remember thinking, "well shit, don't forget that name" as it was something i hadn't heard before.
i talked to a friend last night who collects gems and the like, he seems to think chrysoprase is a good guess given the location of origin, color/translucent qualities, and the formation from growth along the bottom. it looks quite similar to his own much larger pieces, even those in their rough natural state. he is going to show his dealer and ask what he thinks though. apparently there are some tests i can do involving dry heat vs moist heat which may also help to determine if it is correct but may not be necessary and save me some re polishing.