Turquoise
This blue is so famous that it has a name for the color "turquoise blue."
It is a beautiful light blue gemstone that symbolizes water that hydrates the dry earth.
Turquoise, also known as Turkish stone, is said to have been named not because it originated in Turkey, but because the merchants who transported it were Turkish.
Turquoise has the characteristic that its color darkens when it is soaked in oils, etc. The legend of turquoise as a "traveler's stone" that changes color when its owner is in danger and protects the traveler to their destination may have been told by traveling merchants who knew about this unique feature of turquoise.
The turquoise that talkative selects are turquoise from Kazakhstan, also known as lavender turquoise, which has a faint mauve hue, and Australian turquoise, which is rarely seen in circulation due to its extremely low production.
Both are often chosen because they are a pale, fresh blue and the designer's favorite color.