瑠
ル, リュウ, るり

lapis lazuli

JLPT1 G7 S14 F2352

玉 jewel + 留# for the sound alone to transliterate the middle syllable of the Sanskrit vaidurya (lapis lazuli: 吠瑠璃). Compare 琉. 璢 is a variant form.

[Full Kanji Etymology List]