Answer:
The shoes look very expensive and elegant, but I can not tell if the diamonds are real.
Step-by-step explanation:
A compound sentence is a sentence containing two independent clauses or more that have related ideas, and that may be joined by a semicolon or coordinating conjunction like and, but, so, for, nor, or, yet. An independent clause is a group of words with a subject and a verb that expresses a complete thought.
An example of a compound sentence describing the picture is the following: The shoes look very expensive and elegant, but I can not tell if the diamonds are real.
(The shoes look very expensive and elegant is one independent clause and I can not tell if the diamonds are real is another one).