Ice Gem is a type of Special Gem that was scrapped from Bejeweled Twist. It is a basic type of gem surrounded by wisps of icy mist.
An Ice Gem is created by matching 5 gems in an X formation.
The gem could stop Bomb and Doom Gems from counting down as well as stopping the Chain Meter from decreasing. It still allows time to continue ticking down in timed modes though. This proof was revealed by a user on YouTube.
The notification that appears when an Ice Gem is seen for the first time would have been the only one in Bejeweled Twist that highlights the name of the gem with lavender text color.
Whenever a move is performed while under the effects of an Ice Gem, the Gem Rotator emits small bursts of sparkles as it spins.
When matching an Ice Gem, The Background turns blue and the music will pause itself until the Ice effect disappears.
The ice effect lasts for 4 moves but you can make it last longer by matching more ice gems.
This would have been the only type of match in the Bejeweled franchise that does not require a line of gems to be made.