Broken Glass

Properties
Section	Powders
Spawn temperature	22°C
Heat Conductivity	60%
Relative weight	90
Gravity	0.3
Acid dissolve rate	0%
Flammability	0
State	Powder
Transitions
High temperature	above 1699.85°C
Misc properties
Source code

BGLA can be melted and cooled down again to form regular GLAS. It is the product of pressure being applied to GLAS.

Also, it reflects photons unlike solid GLAS which lets them pass through it.