The Wikipedia snippet below is not backed by a reliable source. Can you find one?
Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!
In page Hope Diamond:
"As part of the investigation, the "Tavernier Blue" diamond was reconstructed from the original French edition of Tavernier's Voyages (rather than the later London edition, which had distorted and modified Tavernier's original figures). The Smithsonian Institution provided ray-tracing and optical spectroscopic data about the Hope diamond.[citation needed]