Garnet is a naturally inert mineral that is a sharp, angular, 12-sided crystal (officially a rhombic dodecahedron), with a hardness of between 7.5 and 8.5 on the Mohs scale (where diamonds, which serve as the benchmark for hardness, rank as a 10).
Garnet crystal’s physical properties make it a superior abrasive, ideal for most industrial applications. Garnet from BARTON’s Adirondack Mine takes those characteristics one step further.
The crystalline structure of BARTON’s ADIRONDACK garnet causes it to fracture into sharp-edged grains while in use. No matter how small they are crushed, the crystals never have a blunt or worn edge.
It is this self-sharpening characteristic that makes this Adirondack deposit the best source of industrial garnet found anywhere in the world.
The BARTON family-owned company has been mining garnet in upstate New York since 1878.
In May 1969, garnet was designated New York State’s official gemstone.
The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science. Mohs based the scale on 10 minerals that are all readily available. As the hardest known naturally occurring substance, diamond is at the top of the scale.
Mohs Hardness Scale