SCA glass is a critical diagnostic tool for cultural resource assessments and archaeological surveys.
The purplish hue is the result of a specific manufacturing process: 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. SCA glass is a critical diagnostic tool for
Manufacturers added manganese oxide to "mask" the natural green or aqua tint caused by iron impurities in the sand used for glassmaking. Sun-colored amethyst refers to glass that has turned
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
When first produced, this glass appeared perfectly clear.