Vertical prismatic blue aquamarine crystal standing with a partial reflection.
Horizontal blue aquamarine crystal prism from Namibia with mirror reflection.
Macro detail of blue aquamarine crystal growth lines from Namibia.
Hexagonal termination of a pale blue aquamarine crystal from Namibia.

Aquamarine

Aquamarine – Be3Al2Si6O18
Elements: Beryllium, Aluminum, Silicon, Oxygen
Class: Silicates – Cyclosilicates
Crystal System: Hexagonal
Hardness: 7.5-8
Topaz
Talc (1)Diamond (10)
Extremely hard. Harder than most gemstones.
Origin: Erongo Mts. – Namibia
Apophyllite & StilbiteBerthierite