Blue topaz is available in 3 principal shades: Sky Blue, Swiss Blue, and London Blue. Sky Blue is the lightest coloration, supplying a delicate, ethereal look. Swiss Blue has a greater brilliant, vivid blue tone, frequently visible because the maximum of the 3. London Blue is the darkest, with a deep, wealthy hue that resembles the color of the sea. The price of a blue topaz pendant is motivated via the gemstone's colour, clarity, and length. at the same time as all 3 shades are beautiful, London Blue topaz is typically considered more treasured due to its rarity and depth of color. but, personal choice performs a great position, and the shade chosen frequently depends on the favored look and fashion of the pendant.