Bella tries to get out of the letter-named-rooms building to go ask Emily for directions, but that's not a stairwell after all, and there's someone shouting at her not to come in and she flinches back and clonks her elbow on the door and boots or no boots she's down and she -
- is falling -
A man with very long reddish hair opens it and immediately breaks into a broad smile. "Rúmil!"
"Mahtan!" he says. "How are the girls?"
"Cleverer than I'll ever be," he says, and nods at Bella. "Hello, miss. You are-?"
Rumil thinks you might be able to make me tinted glasses to make it easier to operate outside in the brightness? Picture.
The lenses are glass and the frame is some kind of metal but I don't know what the tinting is.
I've never actually watched glass being made, 'it's probably melted sand' is really all I know, she says, but she steps in anyway.
It's enough to start with, we'll try other things if melted sand doesn't achieve the desired effects. His workshop takes up almost the entire house, and there are bins filled with stones of all different kinds. He kindles a forge, starts working to heat it up, and points out everything to her and names them as he goes.
She doesn't exactly have another appointment, so she watches. It might have to be a certain color of sand or something to get clear glass; it comes in colors besides 'darkened'...
Sand is a very broad word for many different kinds of ground-down rock. I'd expect the composition matters, but I only have a few options on hand so we'll start with those. If that doesn't work I'll ask Aulë for a hint, and to explain how I should have been able to tell what would work. He shovels some sand into several different metal holders and places them into the fire.
I think the kind on beaches is at least the right general sort, that's what I was thinking of when I said sand.