Antique 9ct Yellow gold open work Charm / Fob / Seal.

The border finely hand engraved with geometrical patterns.

Collet set with an oval Blue John Cabochon.

Fluorspar ( Blue John ) is a Semi-presious mineral, a form of fluorite.

It is highly sort after for it's ornamental value.

Originating from the mines in the Blue John caverns in the Peak District.

Before it can be worked all genuine Blue John from this region is heated in an oven.Previously it was then placed in a bowl of pine resin (or epoxy resin nowadays) after this process it is reheated in a vacuum oven.This binds the otherwise friable crystal structure,allowing it to be turned on a lathe or saw cut then polished with putty power

( tin dioxide ) applied with a moist piece of felt.

Therefore all the cracks, fractures or flaws visible in the images are natural striations and very secure, unless otherwise stated.

Marked ;

9ct

Maker's mark for ;

D & Co.

Registered 1889 ... 1897

( slightly masked by the central cross , but still legible )

Gross weight ;

4.9 grams

Dimensions ;

Fob ;

Base 17 x 12 mm

Height 25 mm

Blue John Cabochon ;

13 x 9 mm

Semi-precious stone weight ;

Approximately 4cts

In good condition.

No damage , chips or repairs .

Free from any engraved presentation inscriptions or monograms.

Some minor age related surface marks and ware to the suspension ring.

( refer to images  )

Clean and ready for use or display.