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. Ruby is known as the gem of courage. Wearing a ruby pendant can help you get through the trials and tribulations of life. Sapphire has always been associated with the sacred and divine. A sapphire pendant is said to bring serenity and purity to the wearer.