Gem: Opal 8

We've set bright green

with wonderful details in the hair

but the centerpiece seems to read 'KAPPA'

This could either be representative of someone's initials or even a piece for a practicing or retired nurse

Fine White Shell Cameo in Filigree Frame 2/10MS Gem: Opal 8Slightly unusual, this vintage brooch features etched leaves in the corners of a detailed rectangular frame. Centered with a gently curved, perfectly carved shell cameo, this is an elegant and sophisticated antique. This can be worn as a pin or a pendant. Metal: 14 Karat White Gold Cameo: Natural Shell, likely conch, in shades of cream and pink Cameo Size: 40 x 30 mm