|Release||7 February 2012 (Update)|
|High alch||0 coins|
|Low alch||0 coins|
|Examine||It looks thicker than normal glass.|
Robust glass is a thick type of glass used for creating potion flasks. It is created by melting red sandstone in a robust glass machine, which can be found southwest of the mud bath in Oo'glog or by the pottery oven in the Ithell district of Prifddinas. The machine requires completion of As a First Resort to use.
Melting red sandstone has no skill requirements, but creating potion flasks from robust glass requires level 89 Crafting. This requirement can be boosted, but it cannot be assisted. Strange and golden crafting rocks can be obtained from creating potion flasks.
|Item quantity required||1|
|Base junk chance||98.9%|
- An update in May 2017 changed the colour from purple to yellow.