Well-known varieties of beryl include emerald and aquamarine. ... Pure beryl is colorless, but it is frequently tinted by impurities; possible colors are green, blue, yellow, and red (the rarest). Beryl can also be black in color. It is an ore source of beryllium.

Is black beryl rare?

Beautiful Black Beryl is a new one to us and we are reliably informed rare.

What is the rarest color of beryl?

Red beryl is the rarest variety of the large beryl family whose better-known varieties include emerald and aquamarine. A cyclosilicate incorporating beryllium and aluminium, crystals of red beryl form in the hexagonal crystal system.