Black Volcanic Glass Used to Make Sharp Objects

This page is the CodyCross answer for the clue below from House of Horrors, Group 1116, Puzzle 1 (Elaborate Costumes).

Question is: Black Volcanic Glass Used to Make Sharp Objects

and the answer is: OBSIDIAN

Word Meaning:

OBSIDIAN — (mineralogy) A type of naturally occurring black glass produced by volcanoes.

Definitions from Wiktionary.

Black Volcanic Glass Used To Make Sharp Objects - House of Horrors CodyCross Answers | CodyCross Solutions