Hardness Scale after Mohs with diamond and Streak-plates

Professional hardness scale comprising 10 different minerals:

• talc
• gypsum
• calcite
• fluorite
• apatite
• feldspar
• quartz
• topaz
• corundum
• natural diamond

All samples are numerated and kept in a wooden etui made of laser cut wood. The inside of the lid shows the hardness scale after Mohs and absolute scale.
This professional set is composed by our comany and contains high quality minerals. Further value is provided by the included accessories: 

• 1 sharp steel needle to scratch
• 1 streak-plate white
• 1 streak-plate black 

This hardness scale is fully functional and the perfect teaching material. 

• outer dimensions: 9.1 x 21.1 x 3.6 cm
• inner dimensions: 7.7 x 19.7 x 3 cm
• weight: about 420g