Zodiac Analysis: Fire element, Mutable sign. Sagittarius can be a bit careless. Generally, Sagittarius have a strong self esteem, don't like to talk much, but are very principled. They are not good at showing their vulnerable side, so their seemingly sudden coldness has actually been building up for a long time.
1:Ruby in Fuchsite
In face, the core of Sagittarus is more stable than most people, but Ruby in Fuchsite can not only strengthen the heart and calm the mind, but also help achieve self-goals.
2: Amethyst
As the stone of wisdom, it can be enhance memory and develop potential intuition. When Sagittarius feels that their brain cells are in short supply, amethyst can provide a continuous stream of inspiration.
3: Purple Fluorite
Occasionally, Sagittarius can be very strict with themselves and can't let themselves go. Fluorite can teach them to treat themselves gently and dissipate their inner stasis. 
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