The term REDDISH GEM can be solved by two crossword solutions: CARNELIAN (9 letters) and GARNET (6 letters). CARNELIAN is a semi-precious gemstone that ranges in color from pale orange to deep red. It is often used in jewelry and is believed to have healing properties. GARNET is also a semi-precious gemstone, but its color range is much wider than CARNELIAN's, including shades of green, yellow, pink, and purple. It is also believed to have healing properties and is often used in jewelry.