17.5 x 3.5 x 2.5 cm
This Chocolate Window Quartz was mined in 2003 in China. Chocolate Window Quartz is a creative name given to this odd variety of Quartz from China originally found in 2005. It came out for a few years, and then disappeared. It is characterized by long milky white coated Quartz covered by a secondary growth that is clear and glassy, and has a natural irradiation that occurred around the edges. This clear secondary face gives a "window" to view inside the Quartz, where the first growth did not. Strange stuff! There were quite a few very attractive clusters and long singles, but the majority of this material has evaporated into the market.
Growth Interference Quartz (GIQ) is an occurrence where Quartz and Calcite compete for space in solution. The calcite changes the habit of the quartz by interfering with the normal quartz growth. When the calcite is then etched away with acid, the results are some fantastic and wild shapes and habits of Quartz!!
The Chinese mineral industry produces a tremendous array of specimens from many different regions in its vast country. One common thing we have found is that most Chinese minerals specimens that surface in worldwide markets tend to "come and go". Some mines produce similar specimens for years, but many localities produce something for a few years, and then it is finished, and something else comes up. Its similar worldwide, but more profound in China. We cannot think of Chinese minerals without first thinking of Fluorite. China has the greatest array of Fluorites of any country. What China lacks in pegmatite minerals, it makes up for in the prolific new sulfide deposits of Inner Mongolia. One thing is for sure about China... when it produces, it usually produces in quantity!