These sea urchin shells are stunning! The natural purple displays itself on the shells through a series of bands that run from the center outward. These shells have a slightly smaller hole than the pink urchin shells so only purchase if you intend to use it with a "stem" or thin base type plant like Brachycaulos, Aeranthos, Stricta, etc.

The coolest thing about these shells is that they have a tiny line cut into the shell so you can use it at a table for namecard holders, or you can just use to to hold a picture at your desk. The line is not visible when place upside down with a place, nor is it visible unless you view the plant from the side (as shown in the pictures).