Glass Ghost

"Glass Ghost" is a Gem Monster that appears in the Steven Universe comic miniseries. It is seen turning the residents of Beach City into glass.

Steven Universe and the Crystal Gems #1
Garnet and Pearl used to tell stories of the Glass Ghost to Amethyst when they first found her to scare her, which worked. While telling scary stories around the campfire, Garnet brings up the story, but Amethyst shows disinterest towards it. Later on, Steven find trails of broken glass, and while following it, he found out that the Glass Ghost is real.

Steven Universe and the Crystal Gems #2
It turns Ronaldo Fryman into glass.

Steven Universe and the Crystal Gems #3
The ghost ends up turning several citizens into glass, and tries to turn Greg into glass too.

Steven Universe and the Crystal Gems #4
The ghost turns the Crystal Gems into glass. It is discovered not to have control over its powers and just wants to be able to touch things. When it hugs Steven's bubble shield, it ends up popping it and poofing itself, freeing its previous victims from the glass incarceration.

Appearance
The Glass Ghost is a tall humanoid made of bluish-green glass. It has crystals that resemble messy hair. The Glass Ghost wears shoulder pads that are jagged. It lack a face excluding its eyes, which are dull-yellowish and large. Its gemstone is located inside the left part of its chest. Its hands appear to be broken off at the wrists, and they float separately from the rest of the body.

Abilities

 * Glass Petrification: The Glass Ghost can turn both Humans and Gems into glass.
 * Anatomical Separation: The Glass Ghost's hands are separated from its body.
 * Regeneration: Despite the assault by Amethyst, it can regain its form with ease.
 * Density Control: The Glass Ghost has some control over its density, allowing it to solidify enough to touch things and become hollow enough to pass through them.

Trivia

 * In issue 4, Garnet suggests that the Glass Ghost is a type of Quartz because it is so strong.

Gemology

 * Obsidian and Moldavite are both naturally occurring forms of glass.