There are many types of Primeval Stones, Xu Huo has the "Time Origin," as well as a stone suspected to be a Primeval Stone found in a space that appeared from Zone 014, plus the Nüwa Stone… The Nüwa Stone is somewhat special, its influence on other minerals isn't immediately apparent, but it's something the King Fungus depends on for long-term survival.
The Girl in the painting has seen all these stones, but what she likes most is the Medal of the Radiant Gentleman. Xu Huo thought the Medal might be made from some special minerals, and these materials would be beneficial to the Girl in the painting. Among the game-world minerals, the Primeval Stones are the best.
So it's not at all surprising that the Medal might be made from some Primeval Stones, but there are many types of Primeval Stones, or rather, many Primeval Stones may not be known to the public, as they are rare and precious.
However, what is unexpected is that someone would use such a Primeval Stone as an ornament.
