Alexandrite (Chrysoberyl) fe-dravite but some faces are slightly

but some faces are slightly tarnished

A typical medium-sized Tanzanite crystal with almost clear sections in the upper half

with several sides/corners/edges

light crystal with an orange-brown tip shows very beautiful horizontal striations

This very large hibonite has everything that makes this find special: a beautiful hexagonal crystal with star reflections on the end faces and a distinct layered structure

Alexandrite (Chrysoberyl) fe-dravite but some faces are slightlyDie Alexandrite vom Lake Manyara zeigen meist einen schwachen Farbwechsel: Im Tageslicht sind sie grnblau, whrend Sie im Kerzenlicht vor allem an Bruchstellen einen leichten purpurroten Schimmer zeigen. Im langwelligen UV Licht leuchten sie dagegen krftig rot. Ein Teil eines Zwillingkristalls.