These are gorgeous and bright white south sea pearls in a substantial 12-13mm size. These pearls are buttons when measured with calipers, but read round to even discerning eyes. White south sea pearls with even reasonably surfaces are more difficult every year to find at friendly prices.
 
The price includes drilling and 18k gold settings in your choice of metal color, but please get in touch for special loose or undrilled pricing.
 
Button pearls are excellent in larger sizes for wearing as studs.