First of all, I think these treasures have prototypes in reality, but they are not so exaggerated. They can be said to be the result of exaggeration by the ancients, and they can also be regarded as a kind of commercial speculation. Rare goods can survive here, which is the way for the ancients to collect money. Don't make it as simple as the ancients thought.
Night Pearl: For example, fluorapatite is a very common luminous mineral. When some powerful ancients discovered it, they might take the lead in blocking the news and monopolizing this vein, and then began to spread rumors, telling the myth of the night pearl, and then chose to auction a few pieces after frying. So as to exert its maximum value.
Of course, I know that there is also a kind of night pearl, that is, some radioactive substances will have a strong luminous effect after being wrapped for special reasons, but this kind of thing does not last long and may be very harmful. If it is not designed and manufactured by people, it is almost harmless.
Avoid water droplets: I think it is absolutely impossible to avoid water droplets instead of oxygen cylinders when diving, but there are indeed many minerals that avoid water, which is called hydrophobicity. Now there is a hydrophobic sand for children's toys that shows hydrophobicity.
The same is true of dust-proof beads. Some minerals don't touch dust, and they become exaggerated after hype!
Gem beads: This is more common, not to mention natural ones such as Tibetan dzi beads and artificial ones.
As for the protective bead, it may be a myth and legend. It is said that Wudang Jinding has one, and Jinding has an oil lamp that can't be blown out for thousands of years. Later, according to scientists' research, there was no rain bead, but the ancients used the surrounding building structure to form the principle of Taiji, turning wind into light.
There is also a legend that the fireball is the roof of the palace and an auspicious animal used in geomantic omen to avoid fire, and the bead in his mouth, the so-called dragon ball, is said to be one of the nine sons of the dragon. Dragon is a water god, so the dragon ball avoids fire, but whether it is dragon or geomantic omen, it is only human imagination. There is no such thing as a fireball in reality.