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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.


My Collecting, My Collection

February 20, 2014

Graham Harrison

The whole thing started with a chance find of some lovely smoky quartz crystals while on holiday in the Knysna area in 1973. I did however grow up on a farm near Johannesburg, so these smoky quartz crystals led to me hunting for amethyst in the Muldersdrift area and in later years spending many days at the old limestone quarry outside Krugersdorp or the manganese working in the same area hunting for bits and pieces to add to my collection.

Graham’s KMF Day display

My first encounter with “rock clubs” was a birthday present of a year’s membership to the Wits Rock & Gem Club. While I could not get through to the meetings that often, the ones that I did attend, and the odd field trip, just added to my conviction that this hobby was here to stay! I have to thank two very special people that in those early days would always make time for me and my barrage of questions and  hunt for rocks through their basements. Mr Watson of the Knysna Rock & Gem Shop (especially for the rhodochrosite he set aside for me for a full year that gave me time to afford it) and to Mr John Hepker of the then Silver Hills Rock Shop near Hartebeespoort dam. These two gentlemen always made the time available and ensured that as a young collector my interest was always maintained.

In later years the rock collection on the farm had reached an incredible size; my bedroom was packed to the rafters and I had “commandeered” a chicken house for the balance. With my military career behind me and settling down to start a family, only the “special” rocks were carefully packed into a Venter trailer and there they remained for a good number of years while we started out. All the other rocks from all those days of collecting remained on the farm and will no doubt confuse many an archaeologist in years to come.

It was only after our first son (Richard) started showing an interest that the “Venter trailer” was again unpacked and this time the bug really bit! We joined the Cape Town Club, then relocated to Johannesburg and joined the Pretoria club, finally relocating again to Cape Town and from then have remained members of the Cape Town Club.

Somewhere along the way two things happened, one called Tsumeb and the other called KMF. Without a shadow of a doubt these two areas, and specifically Tsumeb, have kept me enthralled and of course the bulk of my collection is based on these two areas. I did however go through all the other phases, (the Jan Coetzee phase, Namibian amethyst, and Erongo, etc.), this resulting in a rather large collection that now resides in areas from the lounge through to the kitchen, then the braai room and finally the “rock room” and the garden flower beds!

With access to the respective workshops at the clubs, it was also not long before a fully equipped workshop was established and then for good measure I ended up getting hooked on faceting as well.

As you can imagine things have become rather hectic. Our youngest son (Craig) is a keen collector, Richard equally so, and of course my collection keeps growing as well. We all have to be very grateful to my loving (and patient) wife / their mom. For putting up with all the above, there are however a few rules:

1)      No rocks in the main bedroom, the kitchen sink or on the dining room table.

2)      Any rock that goes through the washing machine is ‘fair game” to the first to see it!

My only regret is that there is not enough time for everything I would like to achieve with regards to the hobby. What it has however led to, is the privilege of being able to visit and experience many things in this beautiful country, it has set the direction for Richard’s career (now 3rd year geology) and Craig has so far had a lot of fun thanks to the hobby. We all have to be very grateful to their mom and my loving wife (Nicky) in being so patient and supportive in allowing us to enjoy our hobby to the full both at home and on our travels. As well as filling many available corners of the house with cabinets and rocks!!

Graham Harrison

 

The Tigers Leave for the Jungle

September 23, 2013
Do you remember the Hout Bay tigers mentioned in our July newsletter? They are now finally free of their Namibian “African Dream” granite and leave for the “jungle” this week after seven months of dedicated work by Robin Kutiniyu. Each block originally weighed about 5 tons, and now is about 2,5 tons. The tigers’ bodies were worked to a high polish, and their stripes etched in freehand afterwards, with tigers eye cabochons inserted in their faces to help them see. Their bases will be...

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My Collecting, My Collection

September 23, 2013
Trevor Vaughn Jones

I began collecting minerals as a schoolboy, when I was given a piece of “copper pyrites”, and even earned by Boy Scout’s Naturalist Badge with a shoebox full of rocks. But my more serious collecting began in my late twenties, when Cape Town had a number of curio shops, all selling Tsumeb and Namibian minerals. They were common – but much harder to find then were South African minerals. I still have two of my earliest: a rhodochrosite and a manganite. I can remember ...
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My Collecting, My Collection

August 22, 2013
Peter Rosewarne



How It All Began


My first exposure to the world of minerals and crystals was while taking geology ‘O’ and ‘A’ levels at school in Brighton, UK, in the late sixties. My interest was of a fairly general nature at that stage, although the seeds of mineral collecting were sown on some field trips, one to North Wales, where I remember being excited by picking up some pyrite and bornite specimens. Next stop was reading geology at Kingston University, London, where a firm inter...
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My Collecting, My Collection

July 23, 2013
My mineral collecting did not start out well. I dropped a prized calcite specimen and it broke. Thirty five years later I still regret it. My clumsiness put me off collecting minerals for twenty years. Evidently I was not up to looking after these treasures that grow in the dark. Instead, as an unconscious penance, I concentrated on faceting, which really is a matter of painstakingly transforming broken crystal fragments into reflective gems, giving them renewed sparkle and life.

But the hunt ...
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Hunting for Tigers in Hout Bay

June 24, 2013
Who would have thought there were tigers lurking in Hout Bay?

In amongst the warehouses of Mariners Wharf, surrounded by chunks of picture stone, granite, rose quartz, sodalite and ironstone, and with an all pervading smell of oily fish, you will find Robin and his tigers. This is a stone carver extraordinaire who brings an amazing sense of movement and reality to his work. His current project of life-size tigers creeping through the undergrowth is his biggest challenge to date.


I was first int...

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Fundamentals of Lapidary, Part 1, Introduction by Donald Clark

June 1, 2013


From the International Gem Society Reference Library

 

Introduction
... Lapidary is a hobby that is enjoyed by people of all ages and circumstances. Unlike most hobbies, what you produce is actually worth more than the labour you put into it. For many cutters, their hobby becomes a part time, or full time profession. 
... Gem cutting can be don...


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The Colours of Quartz

March 23, 2013
The latest issue of The Journal of Gemmology has an excellent article by Ulrich Henn and Rainer Schultz-Güttler called ‘Review of some current coloured quartz varieties’. For those who don’t have access to this journal, published by the Gemmological Association of Great Britain, this is a short summary to help you distinguish the different varieties.


Uncut amethyst crystal, prasiolite (11,5 ct), rock crystal (20,5 ct), amethyst (2,5 ct), citrine (natural?) (8 ct), citrine and rose quar...

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Jaspers - part 2

March 23, 2013
Nebula stone. To quote from the Nebula Stone website: “There are companies that are trying to capitalize on the popularity of our stone’s name (Nebula Stone) because they have learned it has become very popular around the World. Some unethical companies have intentionally sold Kambaba/Kambamba/Kabamba Jasper/Crocodile rock/Galaxyite from Madagascar and South Africa falsely calling them Nebula Stone. Kambaba Jasper is not Nebula Stone. Nebula Stone is an igneous stone (from within the Eart...
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Jaspers Galore

March 23, 2013
JASPER – THE HISTORY

The name jasper means "spotted or speckled stone", and is derived via Old French jaspre (variant of Anglo-Norman  jaspe) and Latin iaspidem (nom. iaspis)) from Greek ἴασπις iaspis, (feminine noun) from a Semitic language (cf. Hebrew יושפה yushphah, Akkadian yashupu).

Green jasper was used to make bow drills in Mehrgarh between 4th and 5th millennium BC. Jasper is known to have been a favourite gem in the ancient world; its name can be traced back in Arabic, P...
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