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Rhombohedral vs. Prism Sector Zones in Hydrothermal Quartz Crystals : Implications for Growth Dynamics
Gemmy hydrothermal quartz crystals typically exhibit each of their six prism and six rhombohedral crystal faces. However, discerning which of the crystal faces were actively growing at any given time during construction ...
Characterization of 18th Century French Glass Trade Beads from Fort Mackinac, MI : Chemistry and Infrared Spectroscopy
Glass trade beads made in Europe were an important commodity in colonial North America. The style and composition of glass beads were unique to each manufacturing site and can be used today to trace trading relationships ...
Characterization of 18th Century French Glass from Saint-Nicolas-des-Biefs, Auvergne-Rhone-Alpes, France : Chemistry and Infrared Spectroscopy
Glass beads manufactured in Europe were brought to North America and used in trade with native American peoples. The style and composition of glass beads can be used to trace intercontinental connections between the 16th ...