Glorfindel's stone

[Feanor of the Peredhil]

Now Keeper... you offend me. Acting as if my theory is insubstantial! Although your point of there being a distinct lack of minerologists in the Third Age holds true, the fact that Elves and Wizards are both masters of lore leads me to believe that there must be a few who are capable of identifying various minerals and their "uses". The simple fact that peridots, emeralds, and heliadors are much different shades of green makes me think that Elves, and Aragorn, whose sight is far keener than our own would be able to see the subtle differences. And we weren't Bloom-bashing, per se, we were just bashing those who cannot see past his good looks to the masterpiece in which he was involved!