Precious Stones

The Ancient Egyptians considered gold to be the skin of the gods, silver to be the bones of the gods and lapis lazuli to be the hair of the gods.

gemporia.com tells us that: In their jewelry, while they had access to more traditionally-considered precious stones, the ancient Egyptians more commonly valued and preferred "gold, Carnelian, Lapis Lazuli, Turquoise, Garnet and Feldspar ... [as well as] Amethyst, Chalcedony, Feldspar, Jasper, Obsidian, Olivine and Quartz."

https://www.gemporia.com/en-us/gemology-hub/article/990/the-most-treasured-gemstones-of-ancient-egypt-and-ancient-china/

In my novel, 

The Harmony of Isis (a surreal romance story showing the tale of Isis and Osiris still playing out in our modern era) I described semi-precious and precious stones as the blood, sweat and tears of the gods, sank into the earth and only brought to light by great effort.

While it is very expensive to buy precious stones in a retail store, when they are set into silver, it's easy to cover your fingers with real sparkle! 

adventure.howstuffworks.com tells us that the 5 most valuable precious stones are:

1. Diamond

Diamonds are by-far the most popular precious stones. While they come in a variety of shapes and sizes, they are ultimately judges by the four C's: cut, color, clarity and carat.

2. Emerald

Emeralds are a rare variety of the mineral beryl. They are green in color because of their high chromium content.

3. Sapphire

Sapphires are one of the hardest stones on the planet; only diamonds surpass them in hardness.

4. Ruby

The cost of a ruby is primarily decided by its color. The brightest and best red ruby is known as the "Pigeon Blood Red".

5. Red Coral

Red coral is often referred to as the "garden of the sea". Initially, it was thought to be a plant but later scientist discovered that these stones actually contain living animals called polyps.

https://adventure.howstuffworks.com/outdoor-activities/climbing/5-most-precious-stones.htm