The kamafugite is a rare type of ultra-potassic rocks, and a rock series contained generally that rock types of alnoite, olivine-melilitite, mafurite, katungite and wugantite and so on.
Sometimes the composition mineral besides the antigorite and the chrysotile, contains the few dolomite, the magnesite, the tremolite and the olivine and so on.
Peridotite has undergone strong serpentinization and was completely replaced by serpentinite, but the pseudomorph of olivine and orthopyroxene still are preserved.
The plagioclase content of the Chang'e-6 samples is significantly higher than that of the Chang'e-5 samples, while their olivine content is significantly lower.
Unlike sedimentary rocks, which are made by particles of sand and other detritus slowly accumulating on top of each other over time, an igneous rock like Olivine is formed by the cooling of magma.
If you go to the southernmost point of the Big Island and go up the east coast about one mile, you will find the Green Sand Beach, which is an entire beach made out of olivine, aka peridot.