Vintage 1930s Tiny Child's Ring Made in Czechoslovakia, size 2, with Turquoise Color Stone

Tiny ring in a gold tone metal, maybe brass, it is a very thin band. Diamond shape with an opaque turquoise color stone in the setting.
Marked 'Made in Czechoslovakia' Using my ring sizer, it is an adult size 2, which is very small. The ring is meant for a child.
The ring is in very good condition. The metal is lightly tarnished, the diamond setting and stone moves and is sometimes crooked.