Exceptionally 249.5 carats Cat’s Eye Golden Beryl. « A Member of the 100 Carats Club », Brazil. Estimate US$ 5,000 – 7,000 (€4,000 – 5,600). Photo Bonhams
Beryl is colorless in its pure form; it is the many different impurities that give beryl its varied coloration. Emerald is the green variety of the species and aquamarine is the blue variety.
Golden beryl (heliodor), colored by small traces of iron, are sufficient to give a colorless beryl a more or less intense yellow tone. It is generally found in the same type of deposits as aquamarine. The present oval cabochon is unusual in that it displays the phenomenon of chatoyancy. The cat’s eye effect is strong and central.
Weighing approximately 249.5 carats and measuring 52.0 x 31.0 x 21.5mm
BONHAMS. GEMS, MINERALS, LAPIDARY WORKS OF ART AND NATURAL HISTORY, 23 Nov 2014 10:00 PST – LOS ANGELES