Red Gemstone, Not Ruby
This page is the CodyCross answer for the clue below from Water Park, Group 751, Puzzle 4 (Swimming Lessons).
Question is: Red Gemstone, Not Ruby
and the answer is: GARNET
Word Meaning:
GARNET — (mineralogy) A hard transparent mineral that is often used as gemstones and abrasives.
Definitions from Wiktionary.