www.mindat.org
Gladiusite
Note: Gladiusite contains both Fe3+ and Fe2+ in the (ideal) ratio of 2:1. The colour of the type material is described as "dark green, almost black". The ...
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www.mindat.org
Gladiusite
Note: Gladiusite contains both Fe3+ and Fe2+ in the (ideal) ratio of 2:1. The colour of the type material is described as "dark green, almost black". The ...
www.mindat.org
Xocolatlite
Probably related to kuranakhite.
mineralexpert.org
Sphalerite - The Zinc Blende — Mineral Expert
Sphalerite (zinc blende) is the most common zinc ore and popular collectors mineral.
mineralexpert.org
Cassiterite - the Tin Ore Mineral Overview — Mineral Expert
Cassiterite (tin dioxide) is chief ore of tin, critical metal for modern technology and popular mineral collectors specimen.
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