Antique silver Tiara with stones

Vintage collectible decoration on the head of a Diadem of silver at least 900 - 925 (on the test) with semi-precious,possibly grown laboratory stones: in the center of the ruby, on the sides of two light amethyst weighing 1 and 1/4 carats, above two larger saturated purple amethyst weighing 2 and 1/2 carats, one large quartz and suspended on a thin chain of small emerald quartz(?). The silver rim has an engraved pattern in the form of a rope with a clasp on a thin adjustable chain. The decoration is authentic ancient,made entirely by hand,the only one of its kind,is in excellent condition and native noble patina peculiar to silver.