Mohs Scale for Pewter (Antimony)

[BurningKrome]

I'm wondering if anyone knows the Mohs Scale rating for Pewter alloyed with Antimony. I can find tin alone (1.5 - 2.5) but the whole point of adding the copper to pewter is the hardness :D

[Dennis]

Modern pewter contains tin copper and antimony. This source says the Moh's hardness is 3.

https://www.linkedin.com/pulse/20140621160420-252588790-pewter-plating