♐︎ The lucky stone of Sagittarius: turquoise
Colour: sky blue. Also named: lapis lazuli, topaz.
Turquoise is blue like a wide sky, and Sagittarius wants to go far. Since ancient times it has been the travellers' stone, and it is said to bring luck on the road.
The lucky star of Sagittarius in the real sky: Kaus Australis.
The assignment of stones is tradition, and the lists differ. It is not medicine.