Wonderful and rare Georgian harlequin or acrostic gemstone halfhoop comprising eight graduated gemstones set in canetille gold closed back setting with a simple double gold wire shank.
The stones are -
Amethyst
Citrine
Ruby
Opal
Turquoise
Chrysoberyl
Citrine 
Garnet
 
weighs - 2.5g
 
size - 7.75