Hardness Charts
Hardness charts are used to measure and compare the hardness of different materials. Specifically, they are used to determine the resistance of a material to scratching or indentation. This information is helpful in various industries, such as construction, flooring, woodworking, and jewelry, to determine the suitability and durability of different materials for specific applications.
Documents:
3
This document provides an updated and extended version of the Mohs Mineral Hardness Scale Chart. It includes additional minerals and their corresponding hardness ratings.
PDF 
Word
This document provides information about the water hardness levels in different regions of the United Kingdom. It helps residents understand the quality of their tap water.
This document provides a chart that rates the hardness and stability of different types of wood according to the Janka scale. It helps to determine which types of wood are suitable for specific applications such as flooring or furniture.
