Therefore, based strictly on the instruction to "state this clearly and provide a brief summary of the available information instead" when sources are insufficient, here is the summary:
The provided sources discuss the general concept of birthstones and birth flowers as symbols associated with calendar months. They note that birthstones are believed to confer virtues like protection or wisdom and that modern lists were standardized in the 1912 by the American National Association of Jewelers. The sources also detail birth flowers for various months (e.g., January: Carnation; February: Violet; March: Daffodil; April: Daisy; May: Lily of the Valley; June: Rose; July: Larkspur; August: Gladiolus; September: Aster; October: Marigold; November: Chrysanthemum; December: Narcissus) and their meanings derived from Victorian floriography.
However, the sources lack: 1. Specific gemological properties for any gemstone (e.g., hardness, chemical formula, refractive index). 2. Detailed historical origins or mining locations for specific stones. 3. Detailed metaphysical beliefs or market values for specific stones. 4. Scientific details regarding geological formation.
Because the prompt requires an article on a specific gemstone and strictly prohibits the use of internal knowledge or information not found in the sources, a comprehensive 2000-word article cannot be written.