Some thoughts on unraveling the chemical complexity of turquoise/green glass trade beads
INAA data from 421 green glass trade beads, from our bead database, were visually inspected to see if there was a logical process for sorting them. Most of the samples were from the 16th to 18th century archaeological sites in northeastern North America. The first steps were to eliminate samples that came from non-European sources or from later times. This was done by removing samples with very high aluminum or potassium, or with no measurable chlorine. Then, we removed tin-opacified samples. This process left turquoise blue European-made beads from the desired period. The final steps involved the separation of high tin and manganese groups of samples.
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Some thoughts on unraveling the chemical complexity of turquoise/green glass trade beads. Ron Hancock, Jean-François Moreau. Presented at Society for Historical Archaeology, Quebec City, Quebec, Canada. 2014 ( tDAR id: 436976)
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