Caldwell & Co. JE

A Superb & Rare Art Deco 5.40ct Alexandrite and Diamond Ring

A superb Art Deco alexandrite and diamond ring by J.E. Caldwell & Co. circa 1930, set with a cushion shaped Ceylon alexandrite weighing 5.40ct, certified untreated and with ‘strong’ colour change, claw set between tapering shoulders channel set with graduated square French-cut diamonds, all in a platinum mount with D-shape band. This lovely ring comes with its original leather box with gold tooling. It is rare to find alexandrite gems of good size, clarity and colour change so this ring is a special piece. To read more about this extraordinary gem and how it changes colour please see our director’s notes below and you can read more information on J.E. Caldwell & Co. in our maker’s biographies.

Further Details

Gemstones and Other Materials5.40ct Cushion Shape Alexandrite from Ceylon with AGL certificate stating the stone is untreated and has a 'strong' colour change of 80-90%.
10 x calibre square diamonds
Condition ReportVery Fine
SettingPlatinum signed J E C & Co and numbered
Weight description4.3 grams
DimensionsUK finger size M, US size 6.25.
Can be adjusted to fit any size.

Directors Notes

Alexandrite is a member of the Chrysoberyl family of gemstones and is known for its fascinating colour change effect from red to green. It was first discovered in 1834 by the mineralogist Nordenskiöld in the Ural Mountains of Russia when it was initially mistaken for emerald as it had been found very close to an emerald mine. However further detailed examination of the gemstone, and the discovery by candlelight of its extraordinary ability to change colour, resulted in its being declared a new and exciting variety of gem altogether. It is said that the first Alexandrite was discovered on the very day that the young heir to the Russian throne, Tsar Alexander II, turned 16 and came of age. It was therefore only fitting that this new gemstone be named in his honour. Not only was Alexandrite discovered on this auspicious day, but the colours of the gemstone mirrored the colours of Imperial Russia and it wasn’t long before it was heralded as the official gemstone of the Tsars. Further discoveries of Alexandrite were made soon after in Ceylon (now Sri Lanka) and for many years these two places were the only known sources of this exceptional gemstone.


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Caldwell & Co. JE

“For those who love beauty and who insist upon its ultimate expression, J.E. Caldwell & Co. are consistently developing new jewels in exquisite forms.  The character of the gems selected, the careful thought and skill exercised in preparation and execution of designs give to these productions their individuality, exceptional charm and unmistakeable stamp of quality.” - Caldwell advert from 1927.

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