When first produced, this glass appeared perfectly clear.
💡 If you find purple glass in a historical context, it likely dates to the turn of the 20th century and was originally crystal clear before being "sun-colored" by decades of exposure. APPENDIX E: CULTURAL RESOURCE ASSESSMENT Colored Amethyst
When exposed to sunlight (UV radiation), the manganese undergoes a chemical change, shifting the glass from clear to various shades of amethyst or violet. 2. Archaeological Significance When first produced, this glass appeared perfectly clear
Beverage and medicine bottles are the most common finds. Tableware: Pressed glass dishes and decorative items. When first produced
Found in the ruins of late-Victorian and early-20th-century structures.
The purplish hue is the result of a specific manufacturing process: