Sapphire:
Sapphire, September's birthstone, has been popular since the Middle Ages.
Folklore claims it protects loved ones from envy and harm.
Mined from alluvial deposits or primary underground workings.
Pictured: Uncut Rough Blue Sapphire.
Sapphires vary by geographic location in appearance and chemical impurities.
They contain distinct microscopic inclusions based on origin.
Divided into three categories: classic metamorphic, non-classic metamorphic or magmatic, and classic magmatic.