Marcasite China 2-2.5in

Marcasite is an Iron oxide that has the exact same chemical makeup as Pyrite, but forms in a completely different crystal structure. Unlike Pyrite, Marcasite does not exhibit a cubic identity, instead, it crystallizes in a variety of other forms, such as tabular, pyramidal, nodules, fibers, flakes, and masses. The colour of both Iron oxides are extremely similar as well, with Marcasite being lighter in color and incapable of producing that “luster” Pyrite is known for.

Marcasite can commonly be found where there is low-temperature hydrothermal activity (in association with minerals such as Galena, Dolomite, Fluorite, and Calcites), as well next to a secondary mineral (mainly over Chalcopyrite). 

Marcasite has been found throughout the world, with important deposits located in France, the UK, Brazil, and the United States.

Marcasite is a mineral sometimes called white iron pyrite. Marcasite is often mistakenly confused with pyrite but marcasite is lighter and more brittle. Specimens of marcasite often crumble and break up due to the unstable crystal structure and it is this crystal structure that is the main difference between marcasite and pyrite. On fresh surfaces, it is pale yellow to almost white and has a bright metallic luster.  It tarnishes to a yellowish or brownish colour and gives a black streak.

Please Note: Natural gemstone or semi-precious stone comes from minerals. Due to their naturality, the stones may have a tiny flaw. Meanwhile, cutting or polishing also makes every piece of gemstone vary in colour and size. The image may look different (colour) due to many monitor or device resolutions.