Unknown Bubbled Object

An unknown bubbled object floating inside Lion's Dimension. It likely belonged to Rose, as she was the only one with access to it and as it sits next to her other belongings.

Appearance
It appears hollow and vaguely resembles an upside down mesoamerican step pyramid, being approximately the size of Steven's head. Seeing as how Gem Bubbles don't distort the color of objects inside (despite having a tinted exterior), the object is likely pink.

Trivia

 * It strongly resembles a pyramidal form of the element Bismuth, which has in traditional alchemic studies and media been seen as an infinite "seed" for creating new environments. It can also exhibit many colours, including the white, yellow, and blue seen in this symbol.
 * Given it's shape, it might serve a similar purpose to the key used by Garnet to open the Pyramid Temple in "Serious Steven." As seen here and here.
 * Since it's (likely) rose colored, the object may have some connection to Rose.