The design, especially the seed pearls, is likely from Art Nouveau, so around 100 years old. Very beautiful design and very well made.
Marked K14 and harp hallmark, suggesting made in Israel.
Weight 11.5g. Smoky Quartz is a bit less than 2cm in diameter, estimated around 20ct.
Ring size is a bit less than 5 with the size adjuster shown in the photo. I am not sure how large it is removing the adjuster.
Condition is really good!