Rose Crystal (薔薇水晶) is a jewel piece from YGGDRASIL.
In the Web Novel, Ainz Ooal Gown gifted his guests attending his personal cocktail party with these crystals.
It was a crystal with a clear radiance that imitated a rose.
The thinness of the crystal petals makes it almost resemble the real thing. They are not fused together but are actually carved from a single crystal. Rather than being crafted magically a craftsman with the attention and genius of God class skill produced it.
- Marquis Gryad compares the rose crystal to something that was petrified.