Natural Alexandrite from Brazil – Oval Green-Brown Gemstone

About Natural Alexandrite

Alexandrite is the colour-changing variety of chrysoberyl, a beryllium aluminium oxide with the chemical formula BeAl₂O₄. In daylight it commonly appears green, bluish green or occasionally yellowish green; under incandescent light it may shift to purplish red, raspberry red or brownish red. The effect is caused by chromium and by the different spectral balance of the light source, not by a surface coating. Alexandrite is…