If you are still in doubt about the combination, then the Itten color sphere will come to the rescue. First, let's decide what color our jewelry matches. Green - emerald and malachite, red - coral, garnet and ruby, blue - topaz and sapphire, blue - turquoise and opal, yellow - citrine and gold, purple - amethyst. Don't forget about white (pearl, white gold) and black (black diamonds, black pearls, enamel, leather straps).