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Mineral Specimens with Zoisite
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A gem crystal of zoisite (same thing as "tanzanite"), terminated, from new finds in Pakistan. This is the natural color for this locality. The ones from Tanzania are typically heated to bring out the blue color. 2.2 x .9 x .4 cm
Yes, this is the same mineral as tanzanite - only not from Tanzania, and not blue (in fact this is the natural base color for zoisite from anywhere else, of which tanzanite is merely a varietal that happens to have blue color) It is a relatively large crystal for the locality, and has a very pretty "stacked" structure with staggered terminations. 3.8 x 1.5 x .7 cm
Yes, this is the same mineral as tanzanite, but as it does not turn purple when heated, these are left alone in their natural state. This crystal is doubly-terminated and quite gemmy. 2.1 x 0.7 x 0.4cm
Super gemmy natural zoisite crystals, without the funny blue color that occurs in the mineral from Tanzania. This crystal is terminated, and weighs 2.5 grams. 2.1 x 0.9 x 0.5cm
A truly oustanding crystal in so many ways! It has , first and foremost, super form and the sharpest crystallization you can ask for in a termination. It is GLASSY in lustre, and complete free of damage. It is NATURAL and unheated to enhance the blue color at the expense of the c-axis red/maroon hue that you can get in natural crystals - this is clearly visible, though hard to photograph, in a shot in the bottom-right showing the c-axis red color quite clearly. Thus , this is a natural trichroic crystal exhibiting purple, blue, and red colors. It is more obvious in person. Lastly, it has a little bit of white rock matrix, with small brilliant specks of graphite crystals, anchoring the base of the tanzie! 3.6 x 2.4 x 0.8 cm
This specimen is glassy, brilliantly lustrous, and semi-transparent. It has rich purple color on the broader crysatl faces ("front") and also excellent blue color along the narrow face. Due to the shade of blue which is rich but not intense neon as you see when these are treated, it is certainly natural and not heated. It has a slight hint of the trichroic third color down the c-axis but the crystal is narrow so it is hard to light the piece enough in order to get it to come out above the purple and blue tones. Hence, I would call this one natural though it does not show well the third color (red). 4.1 x 2.2 x 1.1 cm
A VERY sculptural, glassy, lustrous, bright crystal with superb aesthetics! It is VERY gemmy and transparent in most parts. It shows excellent blue and purple colors along the a and b axes, but the c axis shows no red or brown hue, indicating that it is a crystal treated by heat to enhance the natural blue tones. 3.3 x 2.6 x 1.5 cm
This is the same as mineral as tanzanite, except that the crystals from this locality do not turn blue in nature, so you are looking at the natural color of the species here. This gem crystal weighs 0.9 grams, and is terminated. It is gemmy from top to bottom. 2.1 x 1.6 x 0.3cm
A beautiful, small, very gemmy and lustrous, triangular, purple tanzanite crystal from Tanzania. The right side of the crystal is contacted, but you really do not notice it. Uncut tanzanite crystals are very difficult to obtain today, as the government has really clamped down on export of uncut crystals. 0.8 x 0.7 x 0.4 cm
This is a superb thumbnail of a gemmy, lustrous, tanzanite crystal, displaying tri-chroism (three disparate colors: purple, blue, red, each in a different plane). The third color is the proof of natural coloration - the treated ones do not have red on the long axis. 2.2 x 1.6 x 1 cm (40 carats)
THis is a whopper of a large crystal of tanzanite, showing an exceptionally sharp, steep termination and good color throughout. Uniform blue color like this indicates that, like most specimens of the material, it has been heat-treated to intensify that hue. However, this is considered par for the course for most tanzanites and is one of the few times in minerals I accept such treatment for the beauty it creates, so long as it is disclosed. The crystal is complete on front and sides, contacted only a bit on the backside. The steep termination is awesome from any angle and draws the eye. This is a giant for the price, too, considering what has been available of late (not much!). 8 x 3 x 1.3 cm (68 grams)
This superb miniature is from a rare, small find of about 6 years back. It features mint-green grossular garnets ON tanzanite matrix! The garnets are good in and of themselves, and of quite high quality for the location. The combination, though, is just unique so far as i know. 3.5 x 2.7 x 2 cm
What can i say that the pics do not except that this is BETTER in person, of the very top quality for deep color and intense dichroism! It is glassy and gemmy as hell! Crystals like this, with such obvious facet rough value, are becoming incredibly hard to come by now as the supply of rough dwindles. Given the government monopoly on facet rough pricing over there now, this trend will only continue since they are selling cut stones for cheaper than outside dealers can buy rough and cut it themselves. 3.3 x 2.0 x 1.9 cm
A specimen of surpassing quality, with both gemminess and GEM VALUE going for it. This is a NATURAL tanzanite without having been heated to enhance the blues at the expense of the red hue. This piece is the most strongly trichroic tanzanite crystal I have ever had to offer. It glows with rich colors: blue, purple, and particularly red/maroon along the c-axis. The pictures only approximate the intensity. Moreover, it is a super-sharp, fully terminated crystal of the highest quality in terms of sharpness of form and fine termination. It has lustre like glass. this is a KILLER and of such quality that it is a miracle it was not cut for facet rough (certainly , though, it could be). This is the finest tanzanite I am aware of that is currently on the open market - I have seen 3 larger and more expensive (one heated, among them), but this is the finest in overall quality. He told me at the time that he had gotten this by request, upon asking Bryan Leees to find him the best possible miniature at the time (mid-1990s). 3.3 x 3.1 x 1.5 cm
A gemmy and glassy, 5.96 carat tanzanite crystal from the Merelani Hills of Tanzania. The crystal has good trichroism and is not heat treated. A trivial edge bruise is certainly not detracting from this fine crystal. Government control of the tanzanite mines has made obtaining uncut gem crystals very difficult, hence driving up the price. The two backlit photos highlight the gemmyness of the crystal. gORGEOUS! 1.2 x 0.9 x 0.8 cm
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Rob Lavinsky, rob@irocks.com
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share specimen![Zoisite from Alchuri (Alchori; Aschudi), Shigar Valley, Skardu District, Baltistan, Northern Areas, Pakistan [db_pics/mdpics/MD-38147a.jpg]](db_pics/mdpics/MD-38147a.jpg)
![Zoisite from Alchuri (Alchori; Aschudi), Shigar Valley, Skardu District, Baltistan, Northern Areas, Pakistan [db_pics/mdpics/MD-40461a.jpg]](db_pics/mdpics/MD-40461a.jpg)
![Zoisite from Alchuri (Alchori; Aschudi), Shigar Valley, Skardu District, Baltistan, Northern Areas, Pakistan [db_pics/mdpics/MD-41345a.jpg]](db_pics/mdpics/MD-41345a.jpg)
![Zoisite from Alchuri (Alchori; Aschudi), Shigar Valley, Skardu District, Baltistan, Northern Areas, Pakistan [db_pics/mdpics/MD-41390a.jpg]](db_pics/mdpics/MD-41390a.jpg)
![Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-41832a.jpg]](db_pics/mdpics/MD-41832a.jpg)
![Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-41833a.jpg]](db_pics/mdpics/MD-41833a.jpg)
![Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-41834a.jpg]](db_pics/mdpics/MD-41834a.jpg)
![Zoisite from Alchuri (Alchori; Aschudi), Shigar Valley, Skardu District, Baltistan, Northern Areas, Pakistan [db_pics/mdpics/MD-43096a.jpg]](db_pics/mdpics/MD-43096a.jpg)
![Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-49257a.jpg]](db_pics/mdpics/MD-49257a.jpg)
![Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-49512a.jpg]](db_pics/mdpics/MD-49512a.jpg)
![Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-53034a.jpg]](db_pics/mdpics/MD-53034a.jpg)
![Grossular, Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-53086a.jpg]](db_pics/mdpics/MD-53086a.jpg)
![Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-64391a.jpg]](db_pics/mdpics/MD-64391a.jpg)
![Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-65464a.jpg]](db_pics/mdpics/MD-65464a.jpg)
![Zoisite (Var: Tanzanite) from Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania [db_pics/mdpics/MD-71124a.jpg]](db_pics/mdpics/MD-71124a.jpg)