I feel like I'm watching a real-life version of a Law & Order episode play out.
https://www.washingtonian.com/2017/05/04/law-order-svu-pizzagate-episode/
https://lawandorder.fandom.com/wiki/The_Coventry
https://www.imdb.com/title/tt7444394/characters/nm0931958
An antiquarian or antiquary (from the Latin: antiquarius, meaning pertaining to ancient times) is an aficionado or student of antiquities or things of the past. More specifically, the term is used for those who study history with particular attention to ancient artifacts, archaeological and historic sites, or historic archives and manuscripts. The essence of antiquarianism is a focus on the empirical evidence of the past, and is perhaps best encapsulated in the motto adopted by the 18th-century antiquary Sir Richard Colt Hoare, "We speak from facts, not theory."
A diamantaire (French origin) is a gem-quality diamond manufacturer or producer, master diamond cutter, and graduate gemologist specialized in diamonds.
Such individuals demonstrate considerable expertise in different types of gemstones, particularly when it comes to increasing the value and quality of a rough or raw diamond.[1]
They are highly skilled craftsmen or artisans who are responsible for cutting, polishing and transforming a rough diamond into a finished gemstone ready for setting.
Members of diamond dealing families who have established themselves in the upper echelons of the world diamond industry hierarchy are also often referred to as diamantaires as well.