Masonic Gold Seal Intaglio Blue

This is the piece that I bought at the Milan Naviglio Grande antique market. It is a gold pendant with masonic seal. It is meticulously finished by hand. The colour of the seal is blue-off-white.

I am not sure about the age of this piece. I am hoping it is quite old, maybe around 19th century?

I bought it from an Italian lady. She gave me her name card.