Blue topaz is common and referred to by trade names such as “London Blue,” “Swiss Blue,” and “Sky Blue.” London Blues have a dark steel blue or grayish blue color. Swiss Blues show a highly saturated greenish blue. Sky Blues show pale blue colors and may somewhat resemble aquamarines in hue and tone. Topaz is believed to strengthen faith and trust. A symbol of honor and strength, topaz was believed to bring longevity and wisdom.