Green Rock Chrysoprase Rough

I looked at this rock for a month or more at a local antique store before I bought it. Not sure why as it wasn't expensive.
According to my Google image search it seems to be chrysoprase in the rough. Often rocks like this will be polished and look like glass. Over the years in my limited rock collecting I have become to prefer the unpolished versions. IE geodes broken open rather than smoothly cut in half. Also as I am shallow my basis for buying a rock is that it looks neat.