Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Madeiratopas

A synonym of 'Burnt amethyst'
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Formula:
SiO2
Name:
Named for the colour which is similar to that of Madeira wine.
German synonym of:
See also Goldtopas.


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Unique IdentifiersHide

Mindat ID:
40453 (as Madeiratopas)
40451 (as Burnt amethyst)
3337 (as Quartz)
Long-form identifier:
mindat:1:1:40453:0 (as Madeiratopas)
mindat:1:1:40451:2 (as Burnt amethyst)
mindat:1:1:3337:0 (as Quartz)

Internet Links for MadeiratopasHide

References for MadeiratopasHide

Reference List:
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