There are many crystals, tumbles specifically, that are often misidentified. It is an epidemic, especially for internet sellers. Often, it is not their fault. They are given the ID by their whole sellers, who were given the ID by their contacts who were given the ID by the miners. There is plenty of room for finger pointing.
Let’s take the example of Zoisite with Ruby inclusions which is often misidentified as Fuchsite with Ruby inclusions.
Ruby in Zoisite is usually a darker, more brilliant green infused with medium grade rubies and dark, black horneblende inclusions. Due to its hardness, it is quite popular to use for ornamental stone carvings. Most Ruby in Zoisite specimens will display three colors — green, black and red. Zoisite specimens are typically granular and tend to appear almost “sugary” in most rough. The black amphibole commonly manifests as speckles.
Ruby-Zoisite was first discovered in 1954 in Tanzania and even today, Tanzania is the only place that has this lovely stone. Ruby in Zoisite is also called “Anyolite” which is derived from the word for “green” in the native language of the Massai.
Ruby in Zoisite is part of a larger Zoisite family, which includes Tanzanite and Thulite.
Chemistry: Ca2Al3(SiO4)3(OH), Calcium Aluminum Silicate Hydroxide Mineral Class: Silicates
Group: The only orthorhombic member of the Epidote Group
Hardness: 5.5-6.5 with Ruby 9
Ruby in Fuchsite is a pale to dark green variety of Muscovite (colored by chromium impurities) with medium to low grade ruby inclusions. Many times Ruby in Fuchsite can also be found as large, dark red rubies surrounded by deep emerald green Fuchsite with a beautiful sparkly shine(if the crystals are very small).
Most Ruby in Fuchsite specimens will display four colors–green(fuchsite), red (rubies), blue (kyanite) and cream to white (quartzite).
Ruby/Fuchsite specimens are often found in compact masses with small crystals and can be quite flaky due to its soft nature. Ruby/Fuchsite comes from India as well as a variety of worldwide locations.
Chemistry: KAl2(AlSi3O10)(F, OH)2, Potassium aluminum silicate hydroxide fluoride
Mineral Class: Silicates
Group: Var. Muscovite of the Mica Group
Original article written by Kristi Hugs 2009 All Rights Reserved