Natural Precious Gems

Stones, or other natural materials that have been cut and polished for jewelry use are popular as natural precious gems. They are prize for their durability, beauty, and rarity. In jewelry, sapphires are frequently used. Because sapphires are more resistant to erosion than softer stones, they can be found naturally in some sediments or rock formations. They can also be produced in big crystal boules for industrial or decorative uses.