Topaz are used to make a variety of different jewelry. Chemical uses are still being worked on.
Topaz is one of the gemstones used in the foundations of the holy gates of the city of New Jersulem.
Yes Topaz is a mineral. On the Mohs. Scale it is 8 for its hardness.
The topaz gemstone has been known and used for 2000 years. Besides Jewelry, topaz is used for cutting material and woodworking. Also it can be used for sharp tools for farming.
Wulfenite is an ore of lead and molybdenum.