The chain was the weak link!
Unfortunately, this loses a star and not because of the elite-grade shungite, which looked and felt stunning and I tested with my multimeter to be 100% genuine (zero Ohms of conductive resistance)! No, this review loses a star because I LOST my shungite... the chain simply broke in half after mere days and the stone was gone! Needless-to-say, the quality of the strength of the CHAIN is very suspect and not at all 'elite' to match the shungite! I'll not buy it on a keyring again and tbh, I've found a genuine shungite-source website (direct from Russia) for my future purchases of this prehistoric marvel.