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Showing posts with label sodalite. Show all posts
Showing posts with label sodalite. Show all posts

Monday, October 10, 2011

Purple Gemstones !

When one talks about gemstones and the color purple is mentioned, normally the conversation then tends towards the well known and very popular purple February Birthstone gemstone called Amethyst. Some will also think of the gemstone Ametrine, which is a unique dual gemstone of Amethyst and Citrine.




But there are some other purple colored gemstones that can also be used to make some very colorful and unique jewelry pieces. Four additional purple colored gemstones that are used quite often in jewelry are listed below.


Lepodolite is a lilac-gray or rose-colored phyllosilicate mineral in the mica group that is a secondary source of lithium. It is associated with other lithium-bearing minerals like Spodumene in pegmatite bodies. It is one of the major sources of the rare alkali metals rubidium and caesium. It occurs in granite pegmatites, in some high-temperature quartz veins, greisens and granites. Notable occurrences include Brazil, Russia, United States,Canada and Madagascar.



Sugilite (also known as Luvulite) is a relatively rare pink to purple cyclosilicate mineral. Sugilite crystallizes in the hexagonal system with prismatic crystals. The crystals are rarely found and the form is usually massive. It is mostly translucent but can be opague when mixed with a host rock. Sugilite was first described in 1944 for an occurrence on Iwagi Islet, Japan, where it is found in an aegirine syenite intrusive rock. It is found in a similar environment at Mont Saint-Hilaire, Quebec, Canada. In the Wessels mine in northern South Africa, Sugilite is mined from a strata-bound manganese deposit. It is also reported being found in Italy, Australia and India.


Sodalite is a light, relatively hard yet fragile mineral named after its sodium content; in mineralogy it may be classed as a feldspathoid. Well known for its blue color, Sodalite may also be grey, yellow, green, or purple and is often mottled with white veins or patches. The more uniformly blue material is used in jewelry but the fashionable purple variety hold the greatest attention. It is normally fashioned into cabochons for pendants and beads. Lesser grade material is more often seen as facing or inlay in various applications. Although somewhat similar to Lazurite and Lapis Lazuli, Sodalite rarely contains Pyrite and its blue-purple color is more like traditional royal blue than ultramarine. It is further distinguished from similar minerals by its white (rather than blue) streaks. Sodalite's six directions of poor cleavage may be seen as incipient cracks running through the stone.




And last but not least we have to consider our tried and true gemstones made out of Agate. In one specific location in the Campo Morado area of Mexico, south-southwest of Mexico City, there is a very purple colored Agate. It is a naturally colored purple Agate called the Morado Agate. But as with many other Agates and Jaspers, buyer beware because many are dyed and purple is one of the favorite colors.

Saturday, September 12, 2009

Gemstones in the Rough !

Without going into a long explanation or discussion of where to find, how to find and what you might have to do to find gemstones lying around, or when having to dig them out of the ground, here are some pictures of some "rocks" that one might run into while "Rock Hounding", if you go to the right location.
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For many, it could be a short trip as some of the most important deposits of Amazonite are found in Colorado (since 1876). Other locations where Amazonite is found are in Brazil, India, Kenya, Madagascar, Namibia, Russia and Zimbabwe.
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Now if you want to get a sample of Ametrine, it will require a trip way back into the hills of Bolivia. This is a one source stone from the Anahi Mine.
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Although similar red rocks (Jasper) can be found in many locations, some of the best in the Big Bend Area of Texas, this particular piece that contains Red River Jasper and Red Variscite is only found in the 'Outback' of Australia.
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Sodalite can be found in many locations from Africa, to China to South America. This particular piece of blue Sodalite comes from Brazil.
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This unique find of blue Apatite came from the Diamond Mine area of Arkansas, but Apatite comes from all over -- Brazil, India, Kenya, Madagascar, Mexico, Myanmar (Burma), Norway, Sri Lanka, South Africa and the several locations in the United States.
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The name gives this unique find from the Pacific Ocean California beaches away, San Joaquin Green Jade.
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Discovered on the Island of St. Paul, near the coast of Labrador, Labradorite is a very unusual form of Opaline Felspar. Although originally found only in Labradore, it has now been discovered in Madagascar and other locations near volcanic activity.
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Spider Web Jasper can be found in many locations to include Idaho, Oregon, Arizona and New Mexico to name a few. This particular piece came from Arizona.
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Fluorite is very common throughout the world. But rockhounds in Arizona have to look twice so they don't confuse this nice yellow-green Fluorite with Arizona Peridot.
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Chrysoprase is a common find in Australia, but also comes from Poland and the United States. It is considered the rarest form of Chalcedony.
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