Rain Gauge - Banded Taconite
Banded Taconite is mined from Minnesota Iron Ranges. Our supply comes from the Ely Minnesota area. These rocks are somewhat darker -- with bands of gray, white, black and sometimes red. They often contain enough iron ore to be magnetic.
The rocks are about one inch thick and typically 2 to 4 inches across. They sit flat. A hole is drilled to support the copper wrapped glass gauge. The gauges measures 5 inches (over 12 cm) of rain.