Pearl (Steven Universe) exists as a "Gem".
The BL 7.5 inch gun Mark VI was the 45 calibre naval gun forming the main battery of Royal Navy s .. Royal Navy. Royal Navy. British ordnance terms#BL. calibre. Caliber#Caliber as measurement of length. These ships with seven single gun mounts were significant to the cruiser limitations defined by the Washington Naval Treaty .. cruiser. cruiser. Washington Naval Treaty. Washington Naval Treaty