Natural History - Large Icelandic Spar Specimen Group [20]

1 3/8 - 1 3/4 in. (1 kg total, 36-44 mm).

Or optical calcite, cut into parallelepiped sections, each displaying typical birefringence. [20, No Reserve]

Provenance

From Brazil.
Ex Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).

CONDITION

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AUCTIONS:

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LOT 2344