Rainbow petrified wood 40lb boulder. Let me state before you read this. I’m not 100% sure what it is. I have been told it’s possibly rainbow petrified wood, or it could possibly be saint johns flower agate. I’m not sure I don’t know anything about this. I don’t know how old it is. If you are reading this and you know please educate me. More than likely if you are viewing it you know what it possibly is. It weighs right at 39.6 lb by itself. Trusted and TOP RATED!! Let my feedback speak for itself. If you have any questions feel free to send me a message.