Crysolite Collection

Stones of crystals called Gems of Mount Vesuvius, Plate LIIII
1275131 Stones of crystals called Gems of Mount Vesuvius, Plate LIIII, from Campi Phlegraei: Observations on the Volcanoes of the Two Sicilies, by Sir William Hamilton (1730-1803)

Stones of crystals called Gems of Mount Vesuvius, 1776
Stones of crystals called Gems of Mount Vesuvius, Plate LIIII, from Campi Phlegraei: Observations on the Volcanoes of the Two Sicilies, by Sir William Hamilton (1730-1803)

The Hope Chrysoberyl
Glittering 45-carat chrysoberyl gemstone from Brazil which, has been known among gemmologists for about 170 years

Chrysoberyl cut stone
This is Alexandrite, a cushion-shaped Chrysoberyl (beryllium aluminum oxide) gemstone. Alexandrite is named after the former czar of Russia, Alexander II

Alexandrite crystals
A cluster of the gemstone alexandrite trillings, or twinned crystals. This gemstone was named after the Russian Tsar Alexander II. It can appear in both red or green

Chrysoberyl
Shown here is a crystal and a cut stone of chrysoberyl (beryllium aluminum oxide). Chrysoberl is a gemstone and is also known as cats eye

Alexandrite
A twinned alexandrite crystal. Alexandrite is a variety of chrysoberyl (beryllium aluminum oxide) and is named after the former Czar of Russia, Alexander II

Faceted chrysoberyl
Two cut stones of the gemstone chrysoberyl (beryllium aluminum oxide). This stone is also known as cats eyes

Chrysoberyl cats eyes
Two stones of Chrysoberyl (beryllium aluminum oxide), illustrating the similarity the gemstone has with a cats eye

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