The available sources only contain the following types of information: * Marketing copy for selling birthstone-themed posters and wall art. * Descriptions of product variety, materials, and formats (e.g., canvas prints, framed art). * General e-commerce website navigation and department listings.
These materials lack any of the required data points—such as chemical composition, hardness, mining locations, historical beliefs, or cultural significance—necessary to construct an expert article on a specific gemstone as requested.
Therefore, a comprehensive article meeting the specified requirements cannot be generated from the provided sources.