Cubes of Slate with Pyrite Necklace and an 18k White and Yellow Gold Pendant/Clasp with Fossilized Coral17" slate necklace with pyrite infused into the slate. 3 4" wide x 1 5 8" long 18k white and yellow gold fossilized coral pendant on the necklace with a unique European attachment system in which the pendant is also the clasp. Pushing in on the spring loaded pendant ends allows the pendant, with a quarter twist, to be completely removed from the necklace. One can then change out the pendant for a entirely different style pendant. Very unique,