Silver Cufflinks with a star cut stone

Silver cufflinks with a 4 pointed star cut stone. Cufflinks with gilded frames on two sides of the stone. The stone is in a smokey color but I 'm not sure if it's a smokey quartz. 

Hallmarks: 830 and Swedish importmarks. 

Measurements:1,5X1,3 cm 

This is a vintage piece of jewellery with minor wear that complies to its age. There is some patina on the silver.