fayalite
/ˈfeɪəlʌɪt
/noun [mass noun]
A black or brown mineral which is an iron-rich form of olivine and occurs in many igneous rocks.These minerals occur with manganoan fayalite and manganoan magnetite in a single sample....
- Several pools of syenitic magma were separated from the main body of the melt, each eventually being emplaced as quartz syenite, fayalite granite, and riebeckite granite.
- Associated with the fayalite are quartz, amphibole, and magnetite.
Origin
Mid 19th century: from Fayal (the name of an island in the Azores) + -ite1.
- praepubis
- praeputium
- praescutum
- Praesepe
- praeses
- praesidial
- praesidium
- praestant
- praestation
- praesternal
- praesternum
- praetarsus
- praetaxation
- praeterist
- praeternatural
- praetexta
- praetor
- praetorial
- praetorian
- praetorian guard
- praetorianism
- Praetorian Prefect
- Praetorian prefecture
- praetorium
- praetorship