IDNStudy.com, ang iyong gabay para sa mga sagot ng komunidad at eksperto. Alamin ang mga maaasahang sagot sa iyong mga tanong mula sa aming malawak na kaalaman sa mga eksperto.

Mirrors, jewelry, and knives were made from _____________________.
Obsidian
Volcanic rock
Diamonds
Sapphires


Sagot :

Answer:

-Obsidian

Explanation:

-Obsidian is hard, brittle, and amorphous; it therefore fractures with sharp edges. In the past, it was used to manufacture cutting and piercing tools, and it has been used experimentally as surgical scalpel blades