Crystal Ore

Crystal ore is an ore that is found deep underground. The texture used to be a more light blue of einsteinium ore. Not to be confused with the einsteinium ore itself. However, this was changed in the 15w49a snapshot to a more unique texture.

This ore requires an iron pick or higher to mine. When mined, it mostly drops 1-4 crystal dust. It also has a chance of dropping crystal gems, the ore itself, crystal nuggets and crystal pieces. The ore is the most rare to drop, next rare is the gem, then nugget and the crystal piece is more common than the others, but not as much as the dust.

Upon picking up any of those, you can get the achievement; "Rare ores!".

Obtaining
Mine it!

Natural Occurrence
Crystal occurs around layers 1-13 from bedrock. On average, there are about 20 ore veins in a chuck. The ore veins contain about 1 to 3 ore blocks. In versions before Beta 2.0, it is impossible to find crystal as MCE thought he made it generate once per chunk, but later found out it doesn't generate at all.

Trivia

 * In versions before Beta 2.0, you can not find crystal as it doesn't generate. Unless if you have a mod installed that can change how much and how high ores can spawn, you can't find this ore.
 * Crystal was added to make the healer harder to get.