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 not stamped and was acid tested as minimum 9ct. Weighs approx 1.3grams & is 6.cms high.   

The pins stem is stamped but too hard to read, acid tested as minimum 10k but looks higher. Weighs approx 1.4 grams & is 6.5cms high. The stem is bent slightly near the top...

60mm high & weighs approx 1.8grams. Stamped 9ct to rear. Pin is gold plated base metal. Unknown blue stone, surface exhibits wear.