Amethyst - Colored

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

The purplish hue is the result of a specific manufacturing process: Colored Amethyst

Beverage and medicine bottles are the most common finds. Tableware: Pressed glass dishes and decorative items. Manufacturers added manganese oxide to "mask" the natural

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. Sun-colored amethyst refers to glass that has turned

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

When first produced, this glass appeared perfectly clear.

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