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.