Natural peridot is a gemstone that is found in volcanic rock. It has a color that ranges from olive green to yellowish green, and it can be cut into a variety of shapes. Natural peridot is an affordable gemstone and it has been used as jewelry for centuries. In recent years, it has been used more often in the manufacturing of drill bits because of its hardness. Peridot was first discovered in ancient times, but natural peridots are only found today in one location: the island of Zabargad in the Red Sea near Egypt. Peridot is the gem variety of olivine, a mineral with the chemical composition (Mg, Fe)2SiO4. The word peridot comes from the Arabic word Friday meaning "gem". Peridot is one of the few gemstones that are found in their natural state without needing to be cut. The natural peridot stone price can vary depending on size and quality. The price also depends on whether it is a calibrated stone or not. A calibrated stone has been evaluated by a gemologist and is guarantee...