Prismatic – Elongate, prism-like: well-developed crystal faces parallel to the vertical axis

Common examples include: beryltourmalinevanadiniteemerald

Beryl (Var.: Aquamarine) Locality: Erongo Mountain, Usakos and Omaruru Districts, Erongo Region, Namibia (Locality at mindat.org) Size: 3.6 x 3.1 x 2.4 cm. Look how beautifully this Erongo Mountains aquamarine sits up on the carefully-trimmed matrix! What is more, it is doubly-terminated. And, unlike many aquas from this locality, it is really gemmy through the top half, with a perfect, glassy termination.

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