This die can land in five possible positions and is labelled with the five vowels of English.
It is a relabelled version of the numbered d5 Shard which you can find here:
http://shpws.me/ME9e
You can also find my other shard dice (d3, and the standard set of d4 through d20) here:
http://shpws.me/O0Xc
Additionally, I have a d7 shard which is rounded out at the points which can be found here:
http://shpws.me/RHd6
See also:
d21 shard
d21 consonant shard