Station: [9] Gemstone vein

There is a gemstone vein on this wall. It runs along the entire wall. You can see a rock crystal at both the top and bottom ends.

You can clearly see the different shapes of the gas bubbles: fish-shaped, lying oval, drop-shaped.
Here, the flow direction of the magma is clearly visible, in which the gas bubbles later remained and cooled.

Miners used to follow such gemstone vein to find the coveted gemstones. It was used as a "natural signpost."