Left indexing jade radical — radical form of
玉 with the dot omitted. Anchors
瑜 in the jade-quality family alongside
玛 (agate),
珍 (treasure),
珠 (pearl),
琴 (zither — a jade-stringed instrument).
瑜 specifically means "the brilliant luster of jade," contrasting with
瑕 "the flaw in jade" — the famous pair
瑕瑜互见 "flaws and brilliance both visible."
