Hydromagnesite

Field of view: 20 mm. Crystals of hydromagnesite. The pointed platy white crystals are hydromagnesite. The fine white grains underlying hydromagnesite are not specified. The yellowish-green basement at the upper right is serpentinite.

Recovered from an open space in a meteoric oxidation zone of serpentinite in an accretionary compelx subjected to Pumpellyite-Actinolite facies metamorphism.

Hydromagnesite from this location was described in 1973.