by kingsgrove » Aug 6, 2012 Hi there. Hope this isn't a silly questions. I've tried searching the answer but have not had much luck yet. Since I've begun reading pricescope forums I've read people mentioning some gem windows "closing up" in certain settings (particularly in the colored stone forum). I was wondering how/why this happens, and what types of windows can close up? Plus, what types of settings allow this to happen? Thanks for your help!