1 sky blue topaz blue color like a clear blue sky 2 swiss blue topaz bright deep blue 3 london blue topaz dark deep blue 4 natural blue topaz natural blue like in nature. Main types are as follows. Assessing color and quality in blue gemstones.
1 sky blue topaz blue color like a clear blue sky 2 swiss blue topaz bright deep blue 3 london blue topaz dark deep blue 4 natural blue topaz natural blue like in nature. Main types are as follows. Assessing color and quality in blue gemstones.