From mid-2021, newsletter articles are no longer posted separately here. Interested readers should scan through the newsletter headings under the ‘Newsletters’ tab.

FACETIPS – A GEM CUTTER’S NOTEBOOK

by
Duncan Miller


The faceting articles published over the past few years in the Mineral Chatter have been compiled into a single 128 page document, available for download for those interested in saving all the articles together. To download the pdf file click here.

A 29,18 ct cuprite from Onganja, Namibia, cut by Duncan Miller and now in a private collection in Germany.


Collecting Mining Ornaments

June 24, 2015

A couple of years ago, I bought a small ornamental gold-panning miner from a charity shop. As he was related to our hobby, I wanted to rescue him from an unknown fate, and little did I know it then, but he was the start of a new collecting hobby. Today, I have several mining ornaments, which were shown at a “What’s Up?” exhibit at the June monthly meeting. They are rather rare, and all have been bought cheaply from secondhand dealers. They are made of metal, with two mounted on sliced and polished agate, with a sprinkling of crushed pyrite. One has a seashell, and a couple have old Rob Smith labels.

They mainly feature miners at work, but also include a prospector’s burra, a miniature miner’s safety lamp, and, believe it or not, a mermaid. Two are souvenirs of historic mining areas. The quality of workmanship varies from good to bad, but all have an eye-catching metallic gleam in silvery, bronze or coppery hues. They look good displayed with minerals, but may grab more than their share of the limelight, as they not easily obtainable.  So I have added toy matchbox mining vehicles to the collection. These add a spot of colour. The modern ones are made in Thailand and are fairly cheap. The older British ones, if obtainable, are rather costly. The vehicles are pretty realistic, but I have added little ore loads, made of stones and sand glued together and painted, and now they look even more realistic, engaged in mining activities. And of course, this gives me a chance to play with them. “Once a man, and twice a boy” is what my wife says. I am rather proud of my mining ornaments, for they are not the kind of thing one sees every day, and they provide inexpensive creative fun. And that is the best kind of fun – doing things with the stuff one collects, to prevent them from gathering cobwebs and dust. TVJ

 

Blood in the cracks?

June 24, 2015

by Martine van der Westhuyzen

In the FOSAGAMS announcement of their coming Vivo outing in July, I read that, amongst other stones, dragon stone can be found at Vivo. I wondered what dragon stone could be, so I consulted our old friend Google to find out. This yielded such a diverse set of responses that it took me several hours to try to get to the bottom of the mystery. It included references to dragon stone, dragon blood stone, bloodstone, etc. – but are these all different kinds of stones...


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The Romance of the Stone

May 22, 2015

 “The Romance of the Stone?!”

 

 

-        excitement at having found a special piece of rough that asks for faceting

-        carefulness to get the right design for the rough

-        caution by previewing the new design on GemCad first

-        fear to start new designs or try different types of stones

-        bravery to just do it

-        patience to remove the initial surplus rough and reach the centre point and s...


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Skorpion Zinc mine – another new mineral discovered

May 2, 2015
By Gisela Hinder

The Skorpion Zinc deposit is a complex, non-sulphide zinc orebody situated in a paleo-channel fill overlying rocks of the Port Nolloth Zone of the Gariep Belt about 20 km north-west of the little mining town Rosh Pinah, Karas Region, Namibia.
The Skorpion Zinc mine is the 8th largest Zinc Mine in the world and a world-class integrated mining and refinery operation. Skorpion Zinc's annual capacity is 150 000 tons of Special High Grade zinc.
The zinc-oxide is mainly hosted by arko...

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AGM & Tsumeb

March 26, 2015
The March Monthly Meeting was our Club’s Annual General Meeting, and, as proof that our present Committee is doing a great job of work, they found themselves unanimously voted into office again. Thus our Committee again consists of Malcolm Jackson, Ken Coleman, Jo Wicht, Carol Coleman and Tracy Hannath. Congratulations folks! Keep up the good work. 

Then Richard Harrison gave a talk on Tsumeb minerals. He recently graduated with a degree in geology, and we are proud of our new whizz-kid. H...


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Volcanoes - a red hot love affair

February 23, 2015


If you remember, last November, TVJ (with the aid of Malcolm and his photos) gave us a very interesting talk on zeolite minerals. These minerals are to be found in ancient lavas that flowed out millions of years ago from volcanoes such as those at the Etendeka Plateau in Namibia or the Deccan Trappes in India. Later such minerals as analcime, chabazite, heulandite, and apophyllite were created by mineral rich solutions percolating through the porous rock and filling the residual cavities, k...


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Sing in the New Year

February 23, 2015

André Bergh gave a talk and demonstration of what were described in the last newsletter as “quartz singing bowls”. But as things turned out, the bowls were made of frosted glass, in China. There was a selection in various sizes, and they are tuned to musical notes. When tapped with a drumstick, or using one in a stirring motion rubbing against...


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The Abandoned Fortress

September 4, 2014
Far into the veld a few kilometers north of Steinkopf lies an “abandoned fortress” - the haunt of eagles and buzzards by day and owls at night. In places is evidence of a wide straight track now eroded into potholes and gulleys and overgrown with scrubby bushes. It leads right to the foot of the cliffs in the valley beneath the “fortress”. Th...
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My Collecting

June 3, 2014

Dave Hawes

I have always thought that there are two types of people in the world, those who collect and those who don’t.

Those who don’t, often live in immaculate, almost antiseptic, homes where nothing is out of place.

Those who collect can be divided into several groups: Those who collect for business or academic reasons, it is their work. Those who collect for the appreciation of all things natural, and who usually display a few prized pieces on their mantelpiece. Those who collec...


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My Collecting

April 24, 2014

Rockey Ollewagen

My interest in crystals started about fifteen years ago. I was just a regular IT guy, working in the corporate environment, not having any idea what the crystal world was all about.


Then my wife, Paula, arrived home one day with a quartz crystal which cost R70 at the time. I couldn’...


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