Moh's Hardness Scale - Education Set phenakite all of which is essential

all of which is essential for determining the variety and value of a stone

Approximate size of 1 bowl: 25cm x 25cm x 7cm

The design as an organic edge to it

Shaft Diameter: 8mm                                                                                                          Overall Length: 300mm

Black foam has been added underneath as a protective layer

Moh's Hardness Scale - Education Set phenakite all of which is essentialDescription: These Moh's hardness scales contain the 9 primary minerals of the Mohs hardness scale (excluding diamond) mounted on an identification plaque. A Mohs Hardness Scale sample kit is a collection of reference minerals with known hardness values, typically ranging from 1 (the softest) to 10 (the hardest), used to test and compare the hardness of unknown materials. Users can scratch the materials with one another to determine the relative