Marcasite name was applied by mineralogists to an unstable form of iron sulphide. The color of Marcasite gem stones are black with an iridescent pale bronze tone when struck by light. Some have said they have a brilliant silver color or a bright metallic luster when fashioned with many small facets at the top. Marcasite's hardness is 6.0 - 6.5 making it suitable for most jewelry styles like rings and pendants.Marcasite occurs world wide like in the chalk near Dover, Folkestone, and the French side of the English Channel.
Marcasite is frequently found in inexpensive silver jewelry (pendants and earrings mostly) and have been found in low-end "fashion" watches. It was fashionable and popular in Victorian times but found a lower stature in modern times.
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