This is a pair of AA-quality Akoya pearls in 9-9.5mm. Due to recent akoya mollusk deaths and supply issues, this size has become quite rare especially in high qualities such as what Moline offers. 
 
This pair has a very slight overtone mismatch that is practically unnoticeable in person. 
 
This pair is priced set in 18K gold studs of your color choice including 7mm friction backs, but to purchase loose please get in touch.