bread, coffee, gold, paper, cloth, glass, oil, stone, wood
Papers can be plural if you refer to sheets of paper. He had papers all over his desk. If you talk about manufacturing paper, it's not countable. This factory makes dolls. That factory makes paper.
Likewise, coffee can be plural if you refer to "cups of coffee" like you would order in a restaurant. "We'll have two coffees please."
Stone? I don't understand why that one is in the group. Sitcks and stones are certainly plural.
earth, paradise, nature, the present, advice, death, help, information, news, beauty, experience, horror, knowledge, friendship, theory, literature
I do see a lot of learners use "advices," which is wrong.
However, "die a thousand deaths" is plural. Experience can be plural (These three experiences taught her a lot about herself.) Horrors can be plural if you refer to the things that causes your state of horror. The horrors of the Nazi concentration camps, for example. Friendship and theory both easily take plurals.
baggage, damage, shopping, reading, luggage, parking, weather
Damages is a specific legal term. If you want to make baggage or luggage plural, you have to say "bags" or "pieces of luggage."
- For Teachers