Masonic signet ring for men, typically crafted from stainless steel and featuring a large, square-cut red gemstone, often identified as a ruby or cubic zirconia. 

Key Features

Symbolism: The side of the ring prominently displays the Square and Compasses, the primary symbol of Freemasonry, with the letter "G" in the center. 

Design Details: It includes decorative elements like a Greek key (meander) pattern along the top edge and textured or engraved detailing on the sides. 

Materials: Most versions are made from 316L stainless steel, which is resistant to tarnish and corrosion.