I think the phrase you want is "a glass tabletop." In English, we have the compound word, "tabletop," spelled without a hyphen.
In the case of a coffee table, if you wanted to replace a broken one, you would need "a glass tabletop for a coffee table."
If you wanted a furniture store to help you find one, you would ask for "a coffee table with a glass top" or "a glass-topped coffee table."