What is the difference between a precious gem and semi precious gem? There seems to be some gray areas so it’s worthwhile to take a look at different points of view.

When this categorization came about, it was mainly due to the value and rarity differences between the 4 precious gemstones diamond, ruby, blue safire, emerald and the rest. Today some semi precious gemstones can be worth much more than a precious stone. As an example, many natural pearls garner huge prices, often worth more than a low quality precious diamond, ruby, emerald or sapphire.

My sources include the following; Gemstone Institute of America, The Eye Of Jewelry , https://www.carelle.com/blogs/our-world/precious-vs-semi-precious-gemstones

https://theeyeofjewelry.com/stones/precious-stones-semi-precious-stones-differences/