Here is another snippet…… The big book of corundum. One of the highlights of the show wasn’t a gem or jewelry but the long-awaited compendium on Ruby and Sapphire a gemologist’s guide by Richard H…
Source: Ted’s Tucson Tour ‘17.3
tedtalksgems
Here is another snippet…… The big book of corundum. One of the highlights of the show wasn’t a gem or jewelry but the long-awaited compendium on Ruby and Sapphire a gemologist’s guide by Richard H…
Source: Ted’s Tucson Tour ‘17.3
tedtalksgems 