Below, you can find the full FFXIV: Heavensward item info for the Empty Crystal item. This item is a Stone and is usually a crafting material or the product of a craft. Sometimes it can be dropped from a monster or found in a chest.
Metal Ore Stone Gemstone Parts
 |
Empty Crystal |
|||
|
Stone Level: 1 |
Item Level: 120
NPC:  16 |
|||
|
A transparent crystal almost completely devoid of elemental aspect. |
||||