When you want beautiful, dark and detailed, try Vespertine Gallery at ArtFire. The maker, from the UK, says of her work:
Vespertine Gallery specialises in unique hand crafted gothic jewellery made from an array of components including antiqued brass filigree, Czech crystal and glass, vintage German glass and an assortment of delicate chains and vintage charms and findings.
This was the first of her pieces to catch my eye. this is the Wings of Valour Gryphon Bracelet; strings of rosary beads set off a cameo of a majestic mythical beast.
Here's a dragon pendant that I'd wear in a moment -- for any operatic encounter :)
And this is the Vampira Necklace, combining Renaissance styling and Goth iconography, including a tiny bat and a kitschy cameo of Vampira herself!