Stunning blue topaz from the famous 1969 pocket in Brazil is still considered the best and most important of blue topaz finds, worldwide. They are undisputedly natural, whereas we always have to worry about them irradiating modern colorless topaz to turn it blue. Crystals such as this, from the famous 1969 adjoined pockets of purple Hydroxylherderites and blue topaz, are seldom seen for sale and so this makes a rare addition of a gem species and a gorgeous color to any thumbnail collection. For more information see Peter Bancroft's famous book Gem & Crystal Treasures. From the award-winning thumbnail collection of Sharon and William Panczner, author of the book Minerals Of Mexico, and last seen and exhibited in the 1960s.