Colored Amethyst -

Because manganese was the primary decolorizer used specifically from 1890 to 1920 , the presence of SCA shards helps researchers pinpoint the age of a historical site.

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 Colored Amethyst

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 This phenomenon is not natural to the glass's

The purplish hue is the result of a specific manufacturing process: Tableware: Pressed glass dishes and decorative items

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