The garnet varieties occur in shades of green, red, yellow, orange, dark brownish to purplish red usually cut in small sizes (under 2 carats), as larger stones appear black. Garnet ranges in color from colorless to black though it is often thought of as only red. Garnets have been used since the Bronze Age as gemstones and abrasives. Six common species of garnet are recognized based on their chemical composition. They are pyrope, almandine, spessartite, grossular (varieties of which are hessonite or cinnamon-stone and tsavorite), uvarovite and andradite.