Turquoise - Round Bead Bracelet abalone A Mohs Hardness Scale sample

A Mohs Hardness Scale sample kit is a collection of reference minerals with known hardness values

The benefit to these is that on metal they don't cause as much heat build up as rubber does when sanding and abrading

and well-formed crystal structures

Enough said

Turquoise - Round Bead Bracelet abalone A Mohs Hardness Scale sampleDescription: Turquoise is a striking blue to green mineral known for its unique color and opaque appearance. Composed primarily of copper aluminum phosphate, its vibrant hues arise from copper content, while iron can impart greenish tints. The stone is often found in irregular, nugget like formations and is valued for its aesthetic qualities and historical significance in jewelry and art. It has been treasured as a gemstone for thousands of years.