Featuring the well known square and compasses - the single most identifiable symbol of Freemasonry. The letter G in Freemasonry stands for both God and Geometry. Featuring the well known square and compasses - the single most identifiable symbol of Freemasonry. The letter G in Freemasonry stands for both God and Geometry. Men's Diamond pendant necklace in solid 9ct rose gold. High Polish Finish. Size: 18 x 6.4 mm (0.71 x 0.25 in). Material: 9ct Rose Gold. Total metal weight: 2.98 gr. 40 round cut diamonds (G colour, I1 clarity) = 0.38 ct total. Colour: Clear. Diamond colour: G. Stone cut: Round Cut. Anniversary: 10th Anniversary, 60th Anniversary. Birthstone: April.