Spiruna's Black Crystal

Before

I need to meet Spiruna, who lives in a small house in Orbis Park.

In progress

Spiruna promised to tell me everything that she knows, as long as I find the Black Crystal that she lost in the snowfield while on a search for some materials for spells. Now where in the snowfield must that be...

Completed

I found a snow-covered rock in the snowfield. Could the Black Crystal be somewhere around here?