Colored Amethyst -

Found in the ruins of late-Victorian and early-20th-century structures.

Sun-colored amethyst refers to glass that has turned a purplish tint due to prolonged exposure to ultraviolet (UV) light. This phenomenon is not natural to the glass's original state but is a chemical reaction involving manganese oxide, which was used as a decolorizer in glass production between approximately . 1. Chemical Composition & Origin

SCA glass is a critical diagnostic tool for cultural resource assessments and archaeological surveys. Colored Amethyst

💡 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

This report examines glass, a specific type of historic artifact frequently used by archaeologists to date sites from the late 19th and early 20th centuries. Executive Summary Found in the ruins of late-Victorian and early-20th-century

Beverage and medicine bottles are the most common finds. Tableware: Pressed glass dishes and decorative items.

When first produced, this glass appeared perfectly clear. When first produced

Manufacturers added manganese oxide to "mask" the natural green or aqua tint caused by iron impurities in the sand used for glassmaking.