Diamond form
At the moment of the destruction of Genosha, Frost manifested a secondary mutation giving her the ability to transform her body into organic diamond.
[12] In this form, Frost is translucent and retains mobility while being nigh invulnerable and able to support incredible amounts of weight, though different writers have shown varying accounts of her strength. Her diamond form was at least strong enough for her to tear out of bonds and, in a single punch, send
Lady Mastermind soaring across a room and straight through a wall.
[61]
Emma's diamond body is virtually tireless as she does not produce fatigue poisons and has no need for water nor food.
[95] She is also numbed from emotion, pain and empathy, impervious to cold,
[96] and resistant to heat in this form.
[97][98][99] Despite this high level of invulnerability, her diamond form has a single molecular flaw, which if exploited – such as being shot with a diamond bullet – can cause her body to shatter.
[12] Though the exact location of the flaw in her diamond body has not been stated outright, clues point to it being located in between her eyes.
[100]
Frost's full range of abilities between her diamond state and regular form have been inconsistent
[95][101]; however, later occurrences
[102][103] depict that Frost cannot access her psychic powers in diamond form, explained by different writers as either a distinct genetic flaw
[35] or suppression by her diamond form's
adamantine luster.
[104] Depictions have also stated that Emma has a degree of telepathic immunity while in diamond form, though the extent of this immunity has been portrayed inconsistently as well, ranging from total shielding from psychic invasion to vulnerability to psychic attack.
[97][105] Her diamond form is also stated to emit low-level
ultraviolet light, causing it to glow in darkness.
[104]