It opens the heart so that scorpios don t feel the need to be so secretive and it reduces jealous thoughts and the need to control. The gemstones for scorpio as per western astrology are amber amethyst bloodstone ruby jasper garnet and aquamarine. Sitting in the middle is the dark neutral color of obsidian which is favored by crystal practitioners as a most fitting scorpio gemstone reserved for the zodiac s most emotional sign.