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The article provides information on red wulfenite from Kuruktag Mountains, Xinjiang Uygur, China. Wulfenite is the only collectible mineral that comes from its localities with a color that ranges from red orange to bright red while some crystals are coated on one or same sides with calcite. It became popular in the market in the early 1990s and its size ranges from microscopic to around 4 centimeter on an edge.

The article discusses the paragenesis of ottensites in China. Ottenites are formed in a well formed stibnite crystal deposits that are partly stripped away and followed by fluorite encrustation. They develop subsequently and sometimes entirely occupied the void forming a spherical combination and is confirmed by X-ray diffraction analysis.