Changes Of Rough Diamonds To Polished Diamonds
It's a long road from the mines to the finger of a consumer for a rough diamond to go through all the stages to end up set in an engagement ring but I will give you a condensed vision of this road so that you will be able to further appreciate what you are buying.
Diamonds, today are no longer found lying on the ground, left overs from alluvial deposits. They now have to be mined deep down within the earth. The deposits are called kimberlite pipes and for a carat of cut diamonds, many tons of ore must be excavated from the mine.
The ore is then led on a conveyor belt, by vibration separated, sprayed and cleaned then filtered. The rocks are removed from the diamonds by passing the mixture though an oily substance which allows the diamond crystals to stick in it.
80% of the rough diamonds obtained in this way are not suitable for jewellery purposes and goes to industry.
The remaining diamonds are assorted into sizes, colour, type and clarity and then the rough diamonds, in their great majority, are prepared for sale to the ‘site holder' by DeBeers who will then go about the ‘cutting process' before re-sale on the market.
The rough diamonds are then pen drawn in order to determine what type of cut and clarity they will become. This by the diamond ‘sight holder', a direct customer of DeBeers of which there are but a 150 odd all over the world.
According to what has been decided the rough diamonds are either sawn, cleaved or simply directly girdled before they can go to the following stages, the real cutting process which is the girdling process which gives the diamond its final shape, the polishing process divided into 2 parts, the ‘cutting' or polishing of the main facets and then the ‘brilliandeering' stage which is the cutting and polishing of the ‘end facets', 16 on top and 8 underneath in the round brilliant cut. This differs somewhat with other shaped diamonds so I will not go into it further.
The girdle then may need faceteering, applying facets to the girdle which may enhance the colour somewhat.
The diamonds are then ready to be sold on the international diamond markets where they are bought up by wholesalers, larger manufacturing jewellers and dealers.
The diamonds then find their way to the individual jewellers, online or on the high street, either in loose form or set in an item of jewellery.
Only then will they come into contact with the consumer who would either have seen them in a jeweller's high street window or online at a specialised online diamond jewellery outlet.
About the Author
The Jewellery Web Shop purchases its goods direct on the Antwerp diamond market, direct from the producing ‘sight holder', NOT from wholesalers, manufacturing jewellers or diamond dealers which is why we can specially select the ‘best' diamonds for you from a huge diamond production AND at the most competitive and attractive prices possible.
We have different kinds of diamond jewellery such as diamond rings, diamond pendants, diamond earrings etc
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How To Make A Gemstone Lustrous By Polishing It
Cutting and Polishing gemstones
The shine given to the surface of a stone -either by rubbing it with grit or powder, or against another stone - is its polish. It can also be said thet polishing is the systematically progressive reduction in the size of scratches until they are invisible to the naked eye.. Polishing of a gemstone is done by the use of very finely powdered abrasives such as corundum powder, tripoli, pumice, putty powder, etc. Each gem material requires special treatment to obtain the best results. It is here that most of the trade secrets apply. In general, the polishing powder should not be quite as hard as the material to be polished, else it may grind rather than polish. The material should be used with water or oil to give it a creamy consistency. Dark-coloured gemstones and those that are translucent or opaque, for instance opal and turquoise, are often polished rather than faceted, as they are organic gems. Opal, being a softer rock require treatment more like that accorded cut glass, and soft abrasive powders, such as pumice, suffice to polish them. They may be polished as beads or as flat pieces to be used in inlay work, or cut en cabochon with a smooth, rounded surface and usually a highly polished domed top and flat base. Gems which are transparent are normally faceted, a method which shows the optical properties of the stone’s interior to its best advantage by maximizing reflected light which is perceived by the viewer as sparkle. There are many commonly used shapes for faceted stones. For example, a rough diamond crystal is fashioned into a brilliant-cut. This is the most popular cut for this stone because it maximizes the gem's naturally strong light dispersion. The craftsman, or lapidary, who cuts the stone aims to show its best features, taking into account its colour, clarity, and weight. The facets must be cut at the proper angles, which varies depending on the optical properties of the gem. If the angles are too steep or too shallow, the light will pass through and not be reflected back toward the viewer. There are several stages in the cutting of a gemstone, each of which may be carried out by a different expert.
Read more about how gemstones are polished, engraved and carved
About the Author
Iris Dcosta
www.valuablestones.com