The perfect sized plate for mineral testing! Determine the hardness of minerals using these durable glass plates. If the mineral scratches the plate, it has a hardness factor greater than 5.5 on Moh's hardness scale. Ideal 1" x 2" x 1/4" size for field or lab testing. Sold in packages of 10 plates.
Additional ResourcesNo Additional Resources at the time.
Flinn Catalog/Reference Manual Page 1060
Flinn Middle School Catalog/Reference Manual Page 649