Hardness: mohs hardness 7, mohs hardness, as hard as a steel file.In 1824, an Austrian mineralogist named frich Morse took out 10 varieties of many minerals and measured their relative hardness through scientific experiments.Although the more scientific northrop grumman hardness tester was later used and promoted by the national bureau of standards, jewelers in many countries around the world are still accustomed to the mohs hardness scale.
Meanwhile, we have our own factory and professional designers, so we can make models according to your requirements and needs, such as the model's scale, size, color and others. In addition, we have many professional staff members provide the latest product information, consultancy and product delivery for you to meet your different requirements. Now our works is all over the world.
We are looking forward to cooperating with friends from all over the world and supplying excellent service to you by our faith.