![Blue Crown, 1988 (barium/potash glass with multiple cased colour overlays) by Littleton, Harvey K. (1922-2013) Blue Crown, 1988 (barium/potash glass with multiple cased colour overlays) by Littleton, Harvey K. (1922-2013)](https://images-cdn.bridgemanimages.com/api/1.0/image/600wm.IMA.3222320.7055475/229044.jpg)
Blue Crown, 1988 (barium/potash glass with multiple cased colour overlays) by Littleton, Harvey K. (1922-2013)
![potash Black Forest Glassmuseum historic forest Glass-Centre glassblower glassworks green-glass glassware exhibition murano murano-glass venice venice-glass potash Black Forest Glassmuseum historic forest Glass-Centre glassblower glassworks green-glass glassware exhibition murano murano-glass venice venice-glass](http://minifossi.pcom.de/Glass-museum-black-forest-South-Germany-22.jpg)
potash Black Forest Glassmuseum historic forest Glass-Centre glassblower glassworks green-glass glassware exhibition murano murano-glass venice venice-glass
![Glass Material | Composition, Types of Glass, How to make colored glass? | by Chemistry Page | Medium Glass Material | Composition, Types of Glass, How to make colored glass? | by Chemistry Page | Medium](https://miro.medium.com/v2/resize:fit:1300/1*_MprmV3_kGmrVw1kC8ib0Q.jpeg)