There are many crystals and gemstones that have been used in jewelry for thousands of years as precious and ornamental stones and some of them like emerald, ruby, agate, turquoise, diamond, jade and quartz are quite popular. Some stones like black obsidian were even used in prehistoric era as essential tools.
This web site will provide essential and useful information on natural crystals and gemstones properties and you will find interesting and useful articles about them.
The number of articles will grow to provide as much useful information as possible.
Do not forget to visit glossary page to read definition of technical terms on jewelry and gemstones.