I was looking through the current collection of Italian jeweler Delfina Delettrez(flash with annoying music) on Opening Ceremony, where it is available for sale. The first pieces were being described as "Fairy-tale Lux", kinda of a clunky term, but not a bad description of these frog rings.
Then they had a collection of pieces with darker designs, the usual snakes and vampire teeth and some very nice spiders. Earrings in sterling and pearl
A bracelet in an oxidized sterling silver, with a golden fly caught in the web, under a surprisingly lifelike spider
(All images from Opening Ceremony)