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Rakahau te Kohika

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Ventifact

Ventifact, Rock

GL4145

Three smooth dark grey ventifacts.

Biotite

Biotite, Hand sample

GL4147

Sample of grey, white, blue and tan biotite, with some quartz. The darker inner surface is exposed.

Biotite

Biotite, Rock

GL4149

Hexagonal sample of biotite mica.

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