A coordinating conjunction is a small word (a conjunction) that joins two phrases that are similar and equal in a sentence.
In English, they are and, but, for, nor, or, so, yet. These words help us understand the relationship between the information in the different sentence fragments, and how they fit together.
In the case that you have above, you can use a coordinating conjunction because the information in one part of the sentence does not depend on the other (which would necessitate a subordinating conjunction.)
Depending on what you want to say about these sentences, you can use a couple different conjunctions. An example of a combination of the two sentences is:
- I hate to waste a single drop of this perfume for the perfume is expensive and rare to make.
For is the best conjunction to use here because of the relationship between these two sentences. The second sentence (stating that the perfume is expensive and rare) helps to explain why the speaker values it and does not want to waste it at all. The conjunction for captures this meaning the best.
