Literature Reference: 怀瑾握瑜兮，穷不知所示。—— 《楚辞·九章·怀沙》 Holding jade and precious stones, yet not knowing what to show. Source from 'Chu Ci, Chapter Nine, Huai Sha'.
瑜:
The radiance of jade, auspiciousness and well-being, grace and composure.
Meaning: Yu signifies a precious jade, symbolizing value, beauty, purity, and nobility.