Below, you can find the full FFXIV: Heavensward item info for the Tempered Glass item. This item is a Reagent 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.
Reagents Dyes Crystals Catalysts Miscellany Seasonal Demimateria
 |
Tempered Glass |
|||
|
Reagent Level: 1 |
Item Level: 180
NPC:  3 |
|||
|
Glass treated in flame and then quickly cooled to increase its resistance to heat as well as its overall hardness. |
||||