These hoops are known as in-and-out hoops because they are set with sapphires on the inner ring and the outside.
In the photo, the 3 colored sapphires you see below the 4 on the outside are the sapphire that are set in the inner part of the hoops.
These earrings have a safety lock. You cannot just pull the hoops open; you must press down on the small button on the top back part of the hoop and when you’re closing them they will snap into place.
There is a total of 1.20 carats of sapphires in this pair of earrings.