"Aside from the rooster gemstone that had already been carved, they also polished other small accessories and left behind a large piece that couldn't glow. The head artisan hid some stones and managed to transport the chipped shell back to his home. Besides him, other craftsmen also secretly hid some luminous stone beads they had cut off."
The status of craftsmen was very low, especially in the Gaochang Kingdom, where craftsmen were controlled by the nobility.
In their spare time, they farmed in the villages and were directly conscripted when needed. To leave their craft affiliation required a considerable amount of money.
So, they dared not sell the hidden items immediately and just kept them secretly.