Blue Topaz is known as the gem that has the power to improve one’s communication skills. A blue topaz pendant may make you a more eloquent and confident speaker. 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. Emerald is associated with Venus, the Greek goddess of love and beauty. They say an emerald pendant can protect lovers from unfaithfulness.