The Feature of Jewelry
The gemstone is a stone destined to become a precious gem.
- It has to be beautiful.
- It has to be hard and durable
- Being rare
Although it is said that there are 4000 or more kinds of minerals on the earth, only 100 kinds among these are considered jewelry stones. Their value varies depending on the variety. Some have high monetary value and are therefore called 'Precious stone' and others are of lower value and are therefore called 'Semi-precious stone'.
Precious stones are Diamond, Sapphire, Ruby, Emerald and Alexandrite.
In these four articles, we will explain the characteristics of gemstones in an easy-to-understand manner.
Reference: Kobutsu no fushigiga wakaru hon, Satoru Matsubara, Seibido, 2006.
RELATED ARTICLES
- Introduction to suction nozzles and collets
- Introduction to winding nozzles: an essential component of the motor coil winding process
- Summary of “Grinding” and “Polishing”A brief introduction to these processing technologies and how they are used.
- Orbray Wins Second Consecutive “Semiconductor of the Year” Award in 2023
- History of Orbray crystal glass [Story of Watch 3]
- Introduction to Power Semiconductors: From the basics to applications for each material