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American Institute of Marine Underwriters |
Commodity Search Form
ICELAND SPAR (Calcite, Calc-Spar)
- Description: A glassy mineral used in the construction of polarizing instruments. When intended for optical use, surface scratches preclude its use in this field but it may be used chemically as a very pure calcium carbonate.
- Index: 396
- Commodity Name: ICELAND SPAR (Calcite, Calc-Spar)