Gray’s devotes May 22 auction to modern ceramics, art glassCLEVELAND – Gray’ Modern Ceramics and Art Glass Auction on Wednesday, May 22, will feature the work of the admired Ohio potter, sculptor and teacher George Roby, including works from Roby’s personal collection, plus a single-owner art glass collection from an Ohio collector. Bid absentee or live online through LiveAuctioneers.