***I wonder if anyone in modern times has tried making tooth drill bits out of obsidian?***
I do not really know, but in modern terms obsidian is 5 on the Mohs Scale and of course diamond is 10 - for what it is worth. {tooth enamel is also 5}
19 posted on 01/02/2020 4:30:58 PM PST by Bob Ireland
(The Democrap Party is the enemy of freedom.They use all the seductions and deceits of the Bolshevics)