Bm Hot Sell Rollers Raymond Mill For Calcite Limestone Bentonite

We are here for your questions anytime 24/7, welcome your consultation.

Get Price

Mineral talc gypsum calcite fluorite apatite orthoclase quartz hardness value 7.5 8 8.5 9 9.5 10 mineral zircon topaz chrysoberyl sapphire carborundum diamond to test a new specimen, a smooth surface is selected, and rubbed with a tool or standard specimen.A fingernail will scratch to a hardness of 2 , copper penny 3, and penknife 5.

Online Message

If you are interested in our products, or what we can do to help you, you can always consult our customer service.


Quick response within 30 seconds for technical advice

Complete engineer dispatch within 24 hours

Maintenance free of charge within 12 months from shipment