EXAMPLES OF SCRAPERS
Obsidian was also used to make scrapers, drills and
other tools. The sharpest cutting edge can be obtained
from obsidian. But the edge is fragile and will not hold
up well. The harder basalt will make longer lasting wood
cutting tools and in fact most of the adzes described by
William Mulloy were of either that material or andesites.
the harder andesite.