QUARTZ CHLORITE NEEDLE
An outstanding must have Quartz Chlorite Needle. Unusual formation of a very thin double terminated Quartz Needle. In ancient times these were used as Tattoo Needles and as Acupuncture Needles.
Dhading District, Bagmati Zone, Nepal.
5.6cm x 0.4cm x .04cm, 1g.
Chlorite: (Fe, Mg, Al)6(Si, Al)4O10(OH)8.
Chlorite is a general name for several minerals that are difficult to distinguish by ordinary methods. These minerals are all apart of the Chlorite Group of minerals. The chlorites are often, but not always considered a subset of the larger silicate group, The clays. There are several different minerals that are apart of the chlorite group of minerals. The above formula is only a generalisation of the more common members of this group.
For practical reasons most of the chlorites are considered here as a single mineral, chlorite. Chlorites are generally green and crystallize in the monoclinic symmetry system. They all have a basal cleavage due to their stacked structure. Chlorites typically form flaky microscopic crystals and it is this reason that they are sometimes included in the clay group of minerals. However chlorites also form large individual tabular to platy crystals that are unlike most of the other clay minerals.
The chlorite inclusions in clear quartz are particularly interesting when they form as a coating on a crystal early in its development. Because if the crystal later grows larger, ie. out and around the chlorite coating, the effect will be to produce a phantom crystal. Many times the interior “crystal” is indistinct or ghostly and thus the name phantom.
The local experts tell me that the Chlorite acts like an acid and eats away at the quartz whist it is forming. This is why many Chlorite formations with Quartz appear to be eroded.
Quartz is one of the most common minerals found in the Earth’s crust. If pure, quartz forms colorless, transparent and very hard crystals with a glass-like luster. A significant component of many igneous, metamorphic and sedimentary rocks, this natural form of silicon dioxide is found in an impressive range of varieties and colours.
Quartz in it’s polished form was the most advanced technology thousands of years ago, used by the Assyrians. Quartz was used as a lens to focus light and could start a fire. The Vikings would have used one of these to find the sun on a cloudy day. It would have been used as a magnifying glass too. Today it leads technology being the main component of transistors which make our computers work and solar panels.