Beryl is a silicate mineral group with several varieties of gemstones, including well-known gems like emerald, aquamarine, and morganite, as well as more exotic gems like bixbite, heliodor, and goshenite. Beryls come in a wide variety of colors including greens (emerald), blues (aquamarine), yellows (heliodor), reds (bixbite), pinks (morganite), and colorless (goshenite). On Mohs' scale of hardness, beryl ranks a hard 7.5 to 8. Beryl sources vary by gemstone.