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glass coloring

Glass Coloring May Seem Magical

7 years ago

By the late Jan Rutland who served as Executive Director of the National Bottle Museum until her passing in October 2010

“Sun Amethyst” or “Sun Colored”
Most collectors know that the natural color of old glass is aqua – either blue-green or green-blue. This is caused by impurities in the sand used in the batch. Iron impurities produced the colors blue and green. » Read more