A sapphire is said to bring serenity and purity to the wearer. Wear a pink sapphire pendant for serenity and purity with a splash of fun and irreverence. Emerald is associated with Venus, the Greek goddess of love and beauty. They say an emerald pendant can protect lovers from unfaithfulness. 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.