Corvidae Antique has dated this piece to the Georgian era.

The pin is in very good condition. The stone is crisply faceted and abrasion free; under magnification there is a tiny chip to one corner but it's imperceptible to the naked eye.
Size: 6 x 0.5cm. The stone measures approx 5 x 7mm.
Weight: 1.0g.
Corvidae Antique has dated this piece to the Georgian era.
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