Earthly Treasures: Precious Gemstones

The video discusses the rarity and value of precious stones like emeralds, sapphires, and rubies. Emeralds are rare due to their formation process involving beryllium, making them more valuable than many diamonds. Synthetic emeralds can be created in labs, affecting their perceived rarity. Sapphires and rubies are made from corundum, with their colors determined by different elements. Both stones are strong and have practical applications in technology.

What causes the color change from sapphire to ruby?

What are some practical applications of sapphires and rubies?