Different granite for granite surface plate

Granite Surface Plates
Granite Surface Plates provide a reference plane for work inspection and for work layout. Their high degree of flatness, overall quality and workmanship also make them ideal bases for mounting sophisticated mechanical, electronic and optical gauging systems. Different Material with different physical properties. Crystal Pink Granite has the highest percentage of quartz of any granite. Higher quartz content means greater wear resistance. The longer a surface plate holds its accuracy, the less often it will require resurfacing, ultimately providing better value. Superior Black Granite has low water absorption, thus minimizing the possibility of your precision gauges rusting while setting on the plates. This black granite creates little glare resulting in less eyestrain for individuals using the plates. Superior Black Granite is also ideal for keeping thermal expansion to a minimum.