Oriental room divider screen

This beautiful screen  is 72" x 72" x 1.25", I'm not sure the type of wood, but it is alot heavier than it looks, its over 100 lbs.  It appears to be hand painted, with raised characters and designs that look like pearl or ivory or somthing similar, maybe mother of pearl.  It must be rare and or unique, because after long reseach, we cant find anything thats just like it anywhere.  I hope someone can help, whats it worth, where is the best place to sell?  I'm west of Chicago.  A couple things I noticed, the bottom is flat, all the other screens we've seen have either legs or feet with a riased bottom.  Also, the brass hinges are different, they have two sides so they can be folded either way, in or out.