Definición de Iceland spar en inglés:
A transparent variety of calcite, showing strong double refraction.
- Nodules filled with clear double-refractive Iceland spar with celadonite inclusions have also been found here.
- The large, transparent crystals known as Iceland spar, however, are pure calcite.
- Certain crystals will split incoming light into two separate rays; Iceland spar is one such crystal, as are calcite and quartz.
Definición de Iceland spar en:
- Inglés de EE.UU. dictionary
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