The system prompt requires that all factual claims be based exclusively on the provided SOURCES. Since the SOURCES contain no relevant data, it is impossible to create an article that meets the prompt's requirements for accuracy, depth, or length. Fabricating information would violate the core instruction to use only the provided materials.
Brief Summary of Available Information: The provided SOURCES are irrelevant to the task of writing a birthstone article. They contain no information about any gemstone.