The horoscope stones that correspond to the sign of Capricorn are: black agate, amethyst, chalcedony, blue calcite, rock crystal quartz, kyanite, herkimer diamond, violet fluorite, hematite, jade, jasper, malachite, obsidian, tiger's eye, onyx, peridot. COMPATIBILITY OF THE SIGNS OF CAPRICORN IN ORDER FROM MOST TO LEAST: TAURUS, VIRGO, SCORPIO, CAPRICORN.