Mohs' scale of Hardness

I made this table of the most frequent semi-precious gemstones I use in my jewelry. It helps me to better understand the rocks I work with. In fact the most ennoying part when making jewelry is bead reaming. Unfortunately it often happens, when buying natural gemstone beads, that the holes are to small and you need to ream or drill the beads. I spent so much time on some beads, and I didn't understand first why some beads were more difficult than others, even small one. Now with this table, I know better how challenging each stone can be when making or cleaning jewelry.

The stones can be scratched by a knife blade at 3.5, glass at 5.5 and steel file at 6.5

I hope you will like my table and I will appreciate your comments.

For more informations about Mohs scale of Hardness click on the link.

Some of my creations