Therefore, I will provide a brief summary of the information available in the sources, as instructed.

Summary of Available Information

The provided sources are limited to e-commerce website interfaces and do not contain any specific details about gemstones. The content is as follows:

• Source [1]: This source is a webpage from Target.com. It shows a search for "pandora birthstone" and displays standard website elements such as navigation links (Target Circle™, Weekly Ad, Find Stores), a search bar, and a sign-up prompt for email deals. There is no descriptive text or factual data about any gemstone.
• Source [2]: This source appears to be from Amazon.com. It contains fragmented text typical of a website's footer and navigation menus. It mentions categories like "Beauty & Personal Care," "Clothing, Shoes & Jewelry," and "Books," as well as legal links ("Conditions of Use," "Privacy Notice"). The text includes generic phrases like "Discover more" and "Best Sellers" but provides no information about the gemstone specified in the search query.

In conclusion, the provided sources are insufficient for generating an article on the requested topic, as they lack any relevant data on gemstones, their properties, history, or cultural significance.