I'm not sure if the square stone is agate or jasper but it is a teal blue color mixed with a little white. Above it is a peridot and below it a citrine. All stones are open at the back to let light through. The earrings are stamped on the back 925 for sterling with the artist's initials JGD. They measure 1.50" in length. The center stone measures 3/8" square and the other stones are 1/8" in diameter. The truest color is the third photo. Excellent condition.