Prior to the term peridot being used for all gemstone quality peridot stones, it was also known by the name chrysolite. The gemstone peridot has numerous inclusions and internal fractures, therefore the word's meaning in French is "unclear". Peridot is also known as olivine and has a distinctive shade of green that ranges from olive to reddish green. https://www.rananjayexports.com/blog/peridot_healing_properties_meaning_and_history