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SOLD - 20.80ct Chalcedony, 0.23ct Diamond & Onyx, Platinum Dress Ring - Antique

A stunning, fine and impressive antique 20.80 carat green chalcedony, 0.23 carat diamond and onyx, platinum dress ring; part of our antique jewellery and estate jewelry collections

SKU: A3150
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SOLD - 20.80ct Chalcedony, 0.23ct Diamond & Onyx, Platinum Dress Ring - Antique
SOLD - 20.80ct Chalcedony, 0.23ct Diamond & Onyx, Platinum Dress Ring - Antique


This stunning original antique natural green chalcedony ring has been crafted in platinum.

The early 1900's ring displays an impressive 20.80 ct natural green chalcedony/chrysoprase* cabochon, collet set within an feature platinum pierced decorated scroll wave design.

The impressive setting is embellished with thirty-four eight-cut diamonds, and textured with bead decoration and millegrain decorated borders.

The subtly raised trifurcating shoulders are ornamented with a total of four pear shaped onyx cabochons and a further four eight-cut diamonds.

The bead decorated ring shoulders are embellished with millegrain decorated borders, integrating into the plain hallmarked platinum (pt) shank with a subtle ribbed cuff.

This impressive antique dress ring is supplied with an independent diamond grading report card.

NOTE *Chalcedony is a unique combination of cryptocrystalline quartz and moganite, distinguished by its translucent, solid, light colour, typically in the blue, green, white or grey spectra. Green chalcedony is often referred to as chrysoprase.

Other varieties of cryptocrystalline quartz are banded agate, carnelian and jasper.


This stunning cocktail ring, circa 1910, is exceptional quality set with a large and impressive natural chalcedony and well colour matched old cut diamonds.

The ring is a very good gauge of platinum and is in excellent condition with a very clear hallmark.

Reflections in photographs may detract from the true representation of this fine example of antique jewellery/estate jewelry.

Chalcedony Quality

Colour Natural green

Cut Cabochon

Content 20.80 carats

Diamond Quality

Colour (average grades) H

Clarity (average grades) SI2

Cut Eight-cut

Content (total) 0.23 carat


Length of setting 2.7cm/1.06"

Width of setting 1.85cm/0.72"

Height of setting 1.14cm/0.44"

Ring Size

UK Size P 1/2

USA Size 7 3/4

This ring may be professionally adjusted in size on request to meet your personal requirements

View the complete range of cabochon jewellery at AC Silver
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Andrew Campbell started trading in antiques during the 1970s. Initially, Andrew lived in the South of England, travelling the country, searching for items of silver to buy. Andrew sold these items at various London markets and antique fairs. Over time, and through selling at a range of venues, Andrew built up a large and diverse customer base from private buyers to national and international trade customers.
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