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Dalmatian Stone

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A trade name for a peraklakine rock (microgranite, aplite or rhyolite) consisting of dark spots (arfvedsonite) on a light (mostly feldspar) background.

The material is often incorrectly termed as a "jasper" and the black spots are frequently misidentified as tourmaline.

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Classification of Dalmatian StoneHide

Mineralogy of Dalmatian StoneHide

Essential minerals - these are minerals that are required within the classification of this rock:
Amphibole > Arfvedsonite[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
MesoperthiteA perthite with approximately equal amounts of alkali feldspar and plagioclase.
Silica > QuartzSiO2
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:

Synonyms of Dalmatian StoneHide

References for Dalmatian StoneHide

Reference List:
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Tomasz Powolny and Magdalena Duman ́ska-Słowik (2017) True Colors of "Dalmatian Jasper", Gems & Gemology

Internet Links for Dalmatian StoneHide

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