These are natural opals from Coober Pedy Australia.
They have been inlaid as stud earrings with 9k yellow gold fittings.
All opals, pendants, jewellery etc are ground, sanded, polished and assembled in Melbourne Australia.
Photos are taken under a 60w daylight bulb.
Actual item is shown in photos.
Photos are greatly magnified showing imperfections which the eye can't see.
Please read terms of sale.