Various Cultures have a unique story of the origin of birthstones but this is my favourite.
Dates back to the bible, and in particular the Breastplate of Aaron. Aaron the priest, brother of Moses. God told Moses to make sacred garments for his brother Aaron for his consecration, to serve him as priest. Part of the Garment included a breastplate.
What links both Gem and Jewelry together, well gems are mostly used to make jewelry but they can be used for ornamental purposes. Here’s a quick crash course in Gemmology.
Social etiquette matter and you may need to understand them in relative contexts, especially when a woman is in issue. Why so much ado about the slogan "ladies first all"?