The gems range from 7.61 to 14.33 carats in size. Many consumers know topaz as simply an inexpensive blue gem. They’re surprised to learn that its blue color is hardly ever natural: It’s almost always ...

There's also the incredible 9,630-carat marquise-cut gem and a 15-pound blue topaz, both from Brazil. Texas also has a claim ...

along with the largest known "Lone Star Cut" Texas topaz — a 234-carat gem with a five-point star carved into its pavilion, ...