These earrings by Mociun are available in a variety of gemstones set in 18k gold:

Opal Limited Edition

Round, white opal cabochons have a total gem weight of 0.53 ct.

Turquoise Limited Edition

Round, turquoise cabochons have a total gem weight of 0.54 ct.

Emerald Limited Edition

Round brilliant cut, Zambian emeralds have a total gem weight of 0.72 ct.

Sapphire & Spinel Limited Edition

Purple sapphires and spinels have a total gem weight of 0.70 ct.

Emerald & Diamond Limited Edition

Round brilliant cut, Zambian emeralds have a total gem weight of 0.42 ct.

Antique, round brilliant cut, white diamonds have a total gem weight of 0.23 ct.

Diamond & Sapphire Limited Edition

Antique, round brilliant cut, white diamonds have a total gem weight of 0.24 ct.

Bicolor blue sapphires have a total gem weight of 0.42 ct.