Borax is a naturally occurring mineral composed of sodium, boron, oxygen, and water. It has many uses, including as a cleaning agent, a preservative, and a flux in metallurgy. The crossword solutions for the term Borax are SCHLOCK (7 letters), TINCAL (6 letters), and ORES (4 letters). SCHLOCK is an informal term for something of poor quality or value. TINCAL is a type of borax ore found in dry lake beds. Ores are rocks or minerals from which a valuable substance can be extracted.