Minerals, gems and vampires.

We all know that vampires can be hurt by sunlight, a stake through the heart, and in some versions by silver. But what about minerals and gemstones? Some gems are associated with the sun like sunstone, red garnet and ammolite; some minerals have silver in them like acanthite and some gems like proustite is Ag3AsS3

Which one would you add? Is this good for expanding the vampire lore?