Turquoise 3 10 Gemstone sales Malachite 1 Amethyst 10 I 5 Garnet Which list is arranged from the lowest-selling gem to the highest-selling gem? malachite, amethyst, turquoise, gamet turquoise, malachite, amethyst, gamet garnet, turquoise, amethyst, malachite malachite, turquoise, amethyst, garnet​