| Going back to base price ... I found something interesting in Kunz today. It is about Tavernier's Rule. Kunz claims that Tavernier was not the originator of the rule that is applied to both gemstones and pearls, but that the rule could be traced back to David Jeffries who published a treatise on diamonds and pearls in 1750-1753, and again back to Anselmus de Boot in his treatise on precious stones from 1609.
Apparently that base price or "one time" has a long, long history.
Pg. 330-331 |