gem used as ear plug, jade earring
瑱 centers on a jade ornament worn in the ear: a gem used as an ear plug or a jade earring.
瑱 combines 王 (jade) with 真, which likely contributes the sound. The character specifically denotes a jade ear ornament.
The left side 王 (jade) and the right side 真 (truth) come together: a true jade piece worn as an earring or ear plug.
For テン, imagine ten (テン) jade earrings displayed in a row, each one a perfect gem for the ear.