Yowah Opal is a type of Boulder Opal that is an ironstone nodule with opal veins running through it. Prasiolite is a green quartz, also called green Amethyst.   Bezel setting, with hammered texture frame. 
Design Details 
GOLD - 14k yellow 
GEMSTONE - Yowah Opal, Drusy Prasiolite 
CUT - Round and oval cabochon 
CARAT - 19.30 ct. Yowah Opal, 9.38 ct. Drusy Prasiolite 
SIZE - 21.5 mm, 11x17 mm 
BAIL - Twin hidden bails 5.5x9 mm inside 
OA DIMENSIONS - length 40 mm 
Chain or collar sold separately.