These are a very rare varietal of alkali rich-beryl, which has caused the crystal structure to deform and have a strange look compared to other aquamarines.

Mined in 2003 in Jiangxi, China, this stibnite is one of the largest surviving specimens from what has become one of the world's most significant stibnite finds ...

A variety of Beryl. Variety of beryl high in alkalis (Li 2 O to 2%, Na 2 O to 4%, K 2 O to 2%, Rb 2 O to 1.3% and Cs 2 O to 4.6%).

It is an interesting specimen of Alkali caesium-rich beryl in combination with Rosterite from Badakhshan Province, Afghanistan.

This is a dramatic and unusually robust cluster of tabular, lustrous and translucent, deep blue alkali-rich beryl crystals, to 1.9 cm across. The edge-on ...

This is a wonderfully doubly terminated, tabular, lustrous, sky-blue alkali-rich beryl crystal. It has an amazing color and a nice shape.

... Alkali-rich blue beryl and Cesium-bearing Vorobyevite crystal on matrix. It has magnificent vibrant blue color with excellent crystal isolation and quality.

A rare variety of beryl that contains a high ammount of alkali elements, alkali beryl is typically a mid blue color, between maxixe and aquamarine.

Check out our blue alkali beryl selection for the very best in unique or custom, handmade pieces from our gemstones shops.