need an id

[Nihoa]

from a friends tank, best guess are these are eggs of some type? stock list includes 2 cucumbers, snails (trochus, cerith, astrea, nassarius), Kole tang, Yellow tang, Lemark's angel, Flame angel, Squareback antheis, Cooperband, 6-line and a chromis.

his description:

"Found 6 of these last night on the glass, 3 pairs stacked on top one another and this morning there was 7. They're about 3 mm. long, transparent and kind of a 4 sided segmented cone shape, 3 segments on the top half with the bottom half being the 4th segment with a seed like stucture inside."