When Im leads tours through the glittering alcove, she makes sure to ask students if they know what Texas’ official state gemstone is. They usually don’t know that the answer is blue Topaz.
Tanzanite – The mineral zoisite, which includes the gem variety known as tanzanite, it is often heated at low temperatures to remove a brownish color component to produce a stronger purplish-blue ...
The blue topaz is the state's official gemstone. It's only found in Mason County in the Hill Country. Where: Perot Museum of Nature and Science, 2201 N. Field St. Cost: $25 for nonmembers. Exhibit ...