from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A white variety of olivine that is mostly magnesium silicate Mg2SiO4.
from The Century Dictionary and Cyclopedia
- n. A crystallized mineral which occurs at Vesuvius accompanied by pleonaste and pyroxene.
Sorry, no etymologies found.
It was the crew of Apollo 15 who first found green olivine - specifically, a magnesium-rich variety that goes by the name forsterite, which is also the kind that was spotted by Spitzer.
The resulting magnesium silicate recrystallizes to form forsterite and silica in the temperature range 800-850° C, as an exothermic process.
The existence of forsterite in a star like HOPS-68 is not entirely without precedent; the crystals have been found in the vicinity of young stars before, but never so high up - and never behaving like rain before.
But that's not a problem if the forsterite wasn't created there at all.
As they cool off, they transform into forsterite, a type of silicate crystal often found in comets in our solar system.