An amethyst pendant is said to bring spirituality, tranquility and peace to the wearer. It is even said to help one succeed in business. Sapphire has always been associated with the sacred and divine. A sapphire pendant is said to bring serenity and purity to the wearer. Yellow gold brings out the bronze and golden colors inside a smoky quartz pendant. White gold will highlight the brown and grey tones of the gem. Either way, you can't go wrong.