White Topaz engagement rings? Absolutely! Diamonds may be a girl's best friend, but White Topaz engagement rings are a unique, original, and a far more affordable choice. A sparkling white topaz ring is just the thing if you like diamond jewelry but you're on a budget. We won't tell if you won't! Sapphire is the birthstone of September, and pink sapphire is a very popular gemstone in jewelry today. The bright and happy color of a pink sapphire ring is both playful and trendy.