This large chunk of Black Tourmaline in Quartz, 2-3 inches in diameter, is great for any mineral collection.
Tourmaline is one of the most complicated groups of silicate minerals. Whe tourmaline is found within quartz, the quartz is known as ’tourmalinated’. Black Tourmaline is naturally striated and rich black, making it a beautiful stone to set in jewelry. Tourmaline with quartz is considered a prized specimen for collectors.
See the solar system in action!
This kit focuses on teaching children about electricity and how electronic devices work!
Experience this sphere powered by the sun!
Every kid needs one of these spheres!
NEW 2016 DESIGN! This hip red tee features Pi to 1000 decimal places on an ultra soft 100% cotton shirt.
Provides the power to execute all the basic electrostatic demonstrations on an energetic and dramatic scale with up to 350,000 volts!