Colored Amethyst Official

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

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