gemstone color spectrum

agate alternative amazonite amethyst amulet background beauty bright calcite carnelian collection color colorful crystal crystalline cut cutout ellipse esoteric fluorite gem gems gemstone gemstones healing isolated jade jasper jewelery jewelry jewels kyanite lazurite life lucent magic magical medicine mineral mineralogy minerals moonstone natural nature obsidian out oval pebble pebbles pendant precious quartz recovery rhodonite rhyolite rose round sagenite scheme semi semiprecious spiritual spirituality still stone structure talisman tonality tones treasure tumbled turquoise unakite variety white zoisite