Stunning Victorian old cut diamond fouled anchor pendant/brooch
A "fouled anchor" is called such because it refers to an anchor that has become entangled or hooked on something underwater, like a cable or obstruction on the seabed, essentially making it "fouled" and unable to be properly raised, which is a problematic situation for a ship at sea; in heraldry and nautical insignia, a "fouled anchor" is a stylized depiction of an anchor with rope or chain wrapped around it, representing this entangled state even though it's not functionally problematic in that context
weighs 5.8g and is 44mm long x 21 wide 
English circa 1880