Currently available crafting methods are bad, especially for ironmen. So i thought there should be a way to make molten glass and unpowered orbs etc from it.
Here are wiki links about those items:
Molten glass
Bucket of sand
Soda ash
And i also would like to see sandstone grinder here. It got added to OSRS on 14th of March.
From devblog:
Sandstone to Sand
Drew and his Sandstone Grinder have been added to the West of the Granite Quarry. Drew can store up to 25,000 noted buckets. Players may take unnoted Sandstone to the grinder to generate up to 25,000 sand charges. Each size of sandstone brick from 10KG down to 1KG used to charge the grinder will provide 8/4/2/1 sand charges. Players can then claim noted buckets of sand from Drew at a cost of 50 GP, 1 sand charge and 1 stored bucket.