Silver Stud Earrings with Pink Button Shaped River Pearl 10-10.5 mmPearl Stud Earrings These stud earrings feature cultured river pearls with a soft pink colour and a classic button shape. Each pearl measures between 10mm and 10. 5mm, providing a substantial and well defined appearance. The pearls are set on sterling silver stems, complete with matching butterfly backs for a secure fit. The sterling silver is composed of 92. 5% pure silver, which gives the metal its characteristic bright finish and durability.