This is a cracking piece of antique jewellery. Not stamped but the frame tested as 14k, the pins stem is gold plated. Weighs a hefty 5.8grams & is 6.6cms high. The...

67mm high & weighs approx 1.7grams. Stamped 10K to rear with an unknown makers mark. Pin is gold plated base metal. Stone is 12mm high, the pin is slightly bent.

The pins stem is very faintly stamped 10k. Weighs approx 1.2grams & is 5cms high. The knot display is 11mm wide.  

Weighs approx 2.1 grams (excl the pin guard) & is 70mm high. The stem of the pin is stamped 10K.