Complex sentence: A physically imposing, disciplined warrior, Garnet is the current leader of the Crystal Gems (in Rose Quartz's absence); her gemstones are two garnets which are embedded in each of her hands.
Split into simpler sentences: A physically imposing, disciplined warrior and the current leader of the Crystal Gems (in Rose Quartz's absence). Her gemstones are two garnets which are embedded in each of her hands.