Abundant Mineral-Gem, Also Used in Electronics
This page is the CodyCross answer for the clue below from World of Books, Group 286, Puzzle 5 (Library Card).
Question is: Abundant Mineral-Gem, Also Used in Electronics
and the answer is: QUARTZ
Word Meaning:
QUARTZ — (mineralogy) The most abundant mineral on the earth's surface, of chemical composition silicon dioxide, SiO₂. It occurs in a variety of forms, both crystalline and amorphous. Found in every environment.
Definitions from Wiktionary.