Vintage 1930s Bohemian Garnet Screw Back Earrings. This older vintage pair of garnet screw back earrings are a wondrefull romantic example of estate jewelry. The feature nine deep rich rose cut Bohemian garnets that are all prong set to for the shape of a flower. The bloom has an overall measurement of about 12mm x 10mm. Their screw back finding holds them nicely in the ears. They are gorgeous earrings that have been well cared for.