Topaz is known as the gem that has the power to improve one’s communication skills. A white topaz pendant may make you a more eloquent and confident speaker. Topaz is known as the gem that has the power to improve one’s communication skills. A white topaz pendant may make you a more eloquent and confident speaker. 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.