Basically, I was thinking of a character whose 'wand' is, for whatever reason, her hair. Thus, due to her alignment with earth and light, her hair and eyes are of a radiantly sparkling diamond. Something like that, at least.

[url=http://danbooru.donmai.us/posts/1503937?tags=diamond_%28houseki_no_kuni%29]All I want is to use this as a picture.[/url]

EDIT: [url=http://mangafox.me/manga/wagahai_no_kare_wa_baka_de_aru/c001/16.html]Also, this is pretty much how June's husbando arrives to everything.[/url]