IMMUNE BOOSTING GEMS
The gems stressed for IMMUNE BOOSTING are
CITRINE ( a yellow form of quartz),
Not expensive gems at all.
Interestingly, two of those, Malachite and Turquoise, contain COPPER.
About copper and your health:
What are you supposed to do with the gems?
If you ask me: LOOK AT THEM, and HOLD THEM in your hands.
Just looking at them, I felt an effect, specifically from the CITRINE: it gave my body a desire to fight, it strengthened me.