Sindar, Dwarves, and Glass

[Elianna]

In The Silmarillion it states:

But in Helevorn the first element is Sindarin heledh 'glass', taken from Khuzdul kheled...

At first I was confused, "Why would the Elves steal a word from the Dwarves?" Then I read up on the Sindar, and learnt that the Sindar and the Dwarves were friends.

So then I wondered, "Wouldn't they already have a word for glass?" Then the idea hit me: Do you think it's possible that the Dwarves taught the Sindar how to make glass, and so that's the reason they took the word?