1965 Freemason Past Master Pendant 10k square & compass w/original case

Description

Beatiful 1967 Freemasonry pin.   In good used condition.  Please see photos.  It comes in its original case.  10 karat gold.  Measures 2-1/4 inches in length. 5.6 grams (including the gemstone)
The gemstone rated as a "sapphire" on the gemstone testing device at the jewelry store, but I do not know what kind of gemstone it is.
All sales are final.  Thanks for looking.