What is the rising action of the adventure of the beryl coronet?

In "The Adventure of the Beryl Coronet" by Arthur Conan Doyle, the rising action involves the theft of the valuable beryl coronet from Alexander Holder's home, leading to suspicion falling on his own son, Arthur. As the investigation progresses, tension mounts as the true culprit remains unknown and a sense of urgency builds to resolve the mystery.