Doubly Terminated Topaz (Gem) on Rhyolite Matrix (New Locality) (Direct Mine source) ? Location: Thomas Range Juab Co. Utah. Miniature (see photo for more details). Here we have a beautiful doubly terminated crystal of amber sherry colored topaz from a relatively new topaz locality in the Thomas Range that we as topazminer own and operate in the Thomas Range in western Utah. Here we have a doubly terminated crystal of gemmy topaz that is well-formed sharp and has a beautiful amber sherry color along with a glassy luster. The crystal is of gem quality.