Unknown Bubbled Object

The "Unknown Bubbled Object" is an object bubbled inside Lion's Dimension. It likely belonged to Rose, as she was the only one with access to it and it sits next to her other belongings that are currently housed in Lion. It is also most likely useful or important because it was stored here.

Appearance
It appears to be hollow and has a shape similar to that of 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 either pink or shiny enough to reflect the pink surrounding environment. The central protuberance makes the object look slightly like a rose.

Trivia

 * It strongly resembles a blocky pyramidal form of the element bismuth, which has, in traditional alchemical studies and media, been seen as an infinite "seed" for creating new environments. It can also exhibit many colors, including the white, yellow and blue seen in this symbol. However, bismuth is a metal, not a gemstone.
 * Given its 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 is rose-colored and rose-shaped, the object probably has some connection with Rose Quartz.
 * Gem Bubbles have been used almost exclusively to contain Gems so far, so the object may be a Gem.
 * Steven may be the only character other than Rose to know about the object, as he is currently the only one able to enter Lion's Dimension.
 * It can be assumed it was important to Rose, like all the other things that were in there.