TrekGEO > Mineral Trail > Kanto region > Ibaraki pref. > Adularia

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Makabe village, Sakuragawa city, Ibaraki pref., Japan

This locality is closed to collecting.

IMA approved name

Orthoclase var. adularia


Field of view: 15 mm. Crystals of adularia. The rhombohedral white crystals at the top are adularia. The white basement at the bottom is plagioclase. The blue part is beryl. The gray parts in the interstices of adularia are dirt.

Recovered from a pocket of a beryl-columbite subtype rare-element pegmatite in S-type (Ilumenite-series) granite. Formed in the middle Paleocene (60 Ma).

Adularia from this location was described in 1969.

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