Flora Danica is a company in Copenhagen, Denmark. The make porcelain dishes and decorative objects as well as jewelry. Most of their jewelry is made with natural objects that are dipped in sterling and overlaid in18K gold. This is a necklace made from thin twigs that are treated in the above method. The necklace in 18" long with the extender at full length. The width is 3mm. Not marked, but this method is only used by Flora Danica.