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This month we look at
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African classics - My premier collection |
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KMF Rocks - The website that you are now on. |
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Selling rocks and minerals on auction sites. |
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I will not call myself an expert in this area but I have some experience since I have been selling on auction sites since February 2001. Let me tell you how I experience the auction market. Auction sites are a great way to get inexpensive items sold. I have never listed a high ticket item on an auction site so I am no authority on that. People look for bargains on auction sites. |
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The ABC of selling on auction sites |
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Get listed |
Firstly you need to get listed as a seller. You create a profile where they require you to lodge a valid credit card number. Few people like this but so far I have not heard of any stories of abuse. |
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Start listing |
Then you start listing your items on the auction site. This is a laborious process until you have learned how the system works. We all have our little tricks here. Some rely on the quality of their photos, but it is actually your copy that sells your item. People want to know exactly what they are buying and how much the item is going to cost them inclusive of the freight. You must be truthful in your description. It does not pay in the long run not to describe the item truthfully. Once you have gained a buyer you want to retain this buyer for the future. Give the dimensions and weight and describe the flaws if any on your item. |
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Pricing |
The price. Items are usually listed at a lower than market price on the auction site. When the item is popular it can pick up several bids. I have just recently thought of listing my items at a price that is not a rounded figure. Instead of $ 3.00 list it as $ 3.30. It looks like the item has already received a bid and might spark further bids. |
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Shipping. |
I have found that people find it more comfortable buying from someone in their own country than buying from a place overseas. They feel that they have a greater advantage if something goes wrong. I have often been at a disadvantage shipping from South Africa. Sometimes shipping a single item cost as much as the item itself. |
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More tips |
Tips on when the item is bid on and the auction has closed. Answer the buyer as soon as possible. Tell the buyer exactly what to do and then ship the item as soon as payment has been received. You can use a payment service like PayPal, people feel comfortable using secure sites like that. |
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Know your buyer |
A nifty feature on some auction sites is the rating that they give auctioneers, it helps you to get an ID on whom you are selling to. Not everybody that bids on your item will take the item at the end of the auction. This can be kind of frustrating |
I have included a page of tips from E-Bay for those of you who have not read it yet.
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Buying rocks and minerals on eBay Ready to get the most out of your eBay buying experience? Check out the suggestions we've gathered from our millions of experienced buyers: 1. Know the item you are interested in
2. Check the seller's reputation
3. Decided to bid? Use a Proxy
4. Make note of listing details
5. Phone the Seller
6. Protect Yourself
7. Be Courteous to Other Users
8. General Bidding Tips
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7 KEYS TO MINERAL IDENTIFICATION |
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by Joan M. Perreault |
The beginning collector is often stymied by the identification of his find unless it is a well-know mineral. So what can he do if no expert is handy? First of all, anyone interested in the hobby makes sure he has easy access to at least one book dealing with minerals There are several excellent ones available in paper-back and hardbound - which should be a "must" for anyone interested in rock hunting. |
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Color |
First thing one notices in the field is the color of the specimen. Many minerals come in a variety of colors so one must be familiar with the fact that impurities may cause a mineral to take on a variety of hues. |
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Lustre |
The LUSTRE of the specimen is noted. Does it look like metal or not? Metallic or non-metallic luster is another distinguishing characteristic. If the specimen has a non-metallic luster one can determine if the shine is vitreous or glassy, pearly, adamantine or brilliant like diamonds, resinous or like tree resin, silky or fibrous, or greasy. |
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Weight |
Now the collector will pick up his specimen. Is it heavy for its size of light? With practice, one can usually know what certain minerals weigh |
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Cleavage |
Look at the exposed areas of the specimen -how does the cleavage look? Does the mineral break in a definite pattern suggesting a smooth surface? Minerals may have as many as six cleavage planes. |
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Fracture |
Perhaps instead of cleavage plane, the mineral fractures. The FRACTURE maybe conchoidal or arc-like, hackly or jagged, earthly - even or uneven. |
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Hardness |
The HARDNESS of the specimen simply identifies many minerals. The Mobs scale of hardness identifies common minerals arranged so that each can scratch the fresh surface of the mineral beneath it or minerals of the same hardness will scratch each other. A fingernail is about 2.5; cent 3; knife blade or glass, 5.5; steel file, 6.5. As a guide then, if a knife will scratch a mineral, it has a hardness below 5.5; a mineral over 5.5 will scratch glass. |
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Streak |
If a mineral is drawn across a piece of unglazed tile or pottery, it will leave a powder. This powder is the STREAK another distinguishing characteristic of a mineral. Some streaks are of a different color than the mineral itself. |
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In addition to these seven basic properties, others may be used in identification. Does the mineral fizz in vinegar? If it has lines on the crystal face, it is said to have striations. Is the specimen flexible or elastic? Is it sectile, or in other words, can it be cut by a knife without powdering? Can it be hammered flat without powdering (malleable)? Is the mineral magnetic, flourescent; phosphorescent; luminescent; fuseable? If one is familiar with the seven basic steps and then goes on, he can usually have a head start on collecting in strange territory. |
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Let's take these steps with two "mystery minerals". The mineral is a dark gray 1) with a metallic luster (2). It is heavy (3) and cleaves in three directions (4) or cubic. It is fairly soft (6) and will leave a mark on paper. The streak (7) is gray That's right - galena! The mineral is a bluish purple (1) with a non-metallic luster vitreous (2). It is of medium weight (3) and cleaves into octahedrons (4). It is fairly hard (6) and a knife blade. will scratch it, but a cent will not. The streak is white. (7)could it be fluorite? It melts at a rather low temperature so it is fluorite. |
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The opening of geodes can be a pleasurable and surprising experience if the proper tools are used. The pro uses a set of two hardened steel points fastened to a hand or powered press. Tie thus applies pressure from two sides. This works really well, but the outfit is rather expensive. Another ideal way is to score the geode all the way around rather deeply with your trim saw. You can do this by raising the splashguard and rotating the geode by hand until cut all around. It is then very simple to use a screwdriver to pry these sections apart. The third and most used method is to lay the geode in a soft (earth) depression. Look the geode over for any cracks or weak spots. These should be found and force applied there. When you have decided where you will apply pressure, use a medium weight hammer and center punch. (Never use steel chisel). Put the punch in a spot most likely to keep if from sliding off, and hit it several times; easy at first, then harder. If three or four blows do not open the geode, repeat in other spots until a crack does appear. Then use a screwdriver to pry apart. |
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SAFETY |
Regardless of the method used, always use gloves and safety glasses. Keep your section together with tape or rubber bands when transporting them home. Remember; do not hit geodes with your hammer. You may have on safety glasses, but what about the rock hound three meters away? Chips and burrs from your tools fly like bullets. |
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CLEANING |
After the geodes are opened, extreme care should be taken when cleaning so as not to destroy the many micro crystals they often contain. These are very tiny and easy to overlook. Smythite,siderite, goethite, millerite and strontianite are a few hard-to-come-by crystals that are most times destroyed by the rockhound when cleaning his specimens with brush and water. If the geode, when opened, has iron oxide stain (brown mud coloring), these crystals in all probability have already been destroyed. On these it is safe to wash with a hose and brush. If the discoloration is still present after using soap, water and brush, soak in a solution of oxalic acid, 1/8-cup oxalic acid crystals per.- 5 liters of water. As much mud as possible should be removed before soaking ii acid. Do this with a piece of wire, ice pick, etc - care must be taken so as not to scratch the crystal. CAUTION: DO NOT ALLOW ACID TO TOUCH YOUR SKIN. USE RUBBER GLOVES. Using a hose and brushing occasionally will help speed the cleaning operation; even then it may take as much as six months to clean all stain from your specimens. When clean, wash ill mild soap and rinse extra well. |
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CARBONATES |
Above method will be very effective when geodes are quartz lined, but oxalic acid will dull or even discolor most of the carbonates. For cleaning these I suggest using one-tablespoon oxalic crystal per 5 liters of water. If a yellow precipitate collects on the material while in acid, take it out, wash well, and start over with a weaker solution. A lot of work, sure, but the Oh's and Ah's you will hear from the viewers will more than make the effort worthwhile. From Pik-n-Rock and The Geode |
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UPDATES for the month of October 2001 |
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31 October 2001 Azurite and Alexandrite 30 October 2001 Adamite 29 October 2001 Hematite 28 October 2001 Alexandrite and azurite and orthoclase. 27 October 2001 Topaz and smokey quartz 26 October 2001 Mottramite and malachite and dufftite and calcite and smithsonite 25 October 2001 Dolomite 24 October 2001 Rough 21 October 2001 Wulfenite 20 October 2001 Jewelry New range 19 October 2001 Siderite 18 October 2001 Psilomelane New mineral page 17 October 2001 Rosasite New mineral page 16 October 2001 Quartz 15 October 2001 Papagoite 11 October 2001 Gerdus is out of reach untill the 15th, he will contact you then 9 October 2001 Fossils and euclase and diamonds and tanzanite and desert roses and willemite 7 October 2001 Azurite and calcite and quartz and tourmaline 6 October 2001 Cerussite and aquamarine and dioptase 5 October 2001 smithsonite and mimetite and ettringite 4 October 2001Aegerine and malachite and anglesite and hematite 3 October 2001 Hematite 2 October 2001 Calcite from Tsumeb and chalcedony and descloisite 1 October 2001 Dioptase and smokey quartz and alexandrite 30 September 2001 Mimetite 29 September 2001 Rough (Sugilite) and Aquamarine and Dolomite and Smithsonite 26 September 2001 Gypsum and Aragonite and Chrysoprase 25 September 2001 Sugilite and Bultfonteinite and Hematite and Azurite 23 September 2001 Andradite and Smithsonite and Malachite Psuedomorphs 22 September 2001 Linarite and Torbernite 21 September 2001 Amethyst and Chrysoberryl 20 September 2001 Rhodochrosite and Quartz and Pyrope garnets and Barite and Gaudefroyite 19 September 2001 Copper 18 September 2001 Wulfenite and Hematite and Mimetite and Mottramite 16 September 2001 Emerald and Alexandrite and Strontiopiemontite and Dolomite and Sphaelerite 15 September 2001 Aquamarine and Bultfonteinite and Cerussite 12 September 2001 Gaudefroyite and Sturmanite 11 September 2001 Ettringite and Descloisite 10 September 2001 Ettringite and Mimetite and Mangano calcite and Smithsonite and Chrysocolla and Emerald 9 September 2001 Quartz and Orthoclase and Pyrite and Limonite and Motramite 7 September 2001 Sugilite and Rhodochrosite and Tourmaline and Galena and Sturmanite 4 September 2001 Boltwoodite (Rare) 3 September 2001 Calcite and Rhodochrosite 1 September 2001 Alexandrite
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