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.
This smaller transportable Van de Graaff Generator will easily fit in any classroom!
The Duncan Phoenix Diabolo features a stable, hard rubber shell that retains its shape.
This great rock tumbling kit comes with everything you need to polish stones and gems!
Experience this sphere powered by the sun!
This glass Erlenmeyer mug makes an excellent gift!
Build a tumbling robot that gets up right after it has fallen down, without any outside help!