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What Is The Best Opal Rough To Learn Opal Cutting And Polishing?
什么是最好的蛋白石粗糙学习蛋白石切割和抛光?
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What Is The Best Opal Rough To Learn Opal Cutting And PolishingThis article is written to help cutters of all skill levels choose the best rough opal to cut and polish with.

Cutting Opal from the rough into a finished stone is very rewarding, but as a beginner it can seem a little bit daunting to figure out what type of opal rough to choose. 

First you will require opal cutting and polishing equipment. A basic saw blade and different size polishing grit wheels from steel to rubber impregnated with diamonds in different grades and a polishing wheel.

Lets take a closer look at some of the options.

Rough Opal Types

Mixed parcels of rough opal around $20 to $50 are good to start from Koroit, Ethiopia or Coober Pedy rough. Ironstone with good patterns from Koroit and Yowah opal rough are good to learn polishing, if you polish to hard you wont rub away opal color. Yowah nuts are rock shaped and have strong colors, but it is said only one in a thousand has any color.

Ethiopian rough opals have thick color bars and are good value as it is inexpensive to purchase. So start with a plain patterned on your first purchases and inform yourself about hydrophane properties of this opal especially when polishing in water.

Boulder opal have many thin veins of color and can be difficult to polish with new wheels, this results to cutters rubbing away a lot of color trying to obtain a good finish. In some occasions, Boulder opal rough also needs to be split open by placing it in a saw cutter.

Black opal rough from lighting ridge can be very tricky. Black opal rough comes in two forms, seam opal or nobby opal. Seam opal is formed in layers and is best to learn on as the color bar sits on bottom potch. Most this potch is grey in color and has a body tone N4 to N5 and opal needs body tone N4 and above to be classed as black opal. Most black opal mined at Cochran is called nobby opal. This opal can be expensive and is formed like rock with color bar and can be difficult to read how to cut and polish. Many cutters make mistake of rubbing down the wrong side so when purchasing parcel always start off with cheapest pieces to see how the color faces. Even try cutting on angle to expose the best fire color, clarity of color is more important than size with good black opal. Many opal cutters will say they break even or loose on half rough opal they buy but do well with the other 50%.

So when buying opals that show color bars, you might think why hasn’t the miner rubbed it away? So veined rough has to be viewed as a gamble purchase, but win or loose it is still a fantastic hobby to cut and polish your own opals and set it in jewelry for family and friends.

The parcel below displays a lot of blue to green color in crystal. All opal miners look for nobbies for color formed on potch. Potch is basically opal that is one colored ie just white, just black etc. It is the most common type of opal what we want to find is precious opal that display many colors. Some of these chunks will display opal bars but it’s difficult to check when its in this rough condition. Larger pieces are sawed in two on a rough cutting wheel in order to expose any color.

Rough Opal

Opal Rough For New Cutters

New opal cutters are best to start with boulder ironstone or Koroit opal rough. Alternatively Ethiopian Rough opals is still reasonable price at present and as the crystal color bars are thick, it is good for new cutters.

Once you have cut a few hundred opals and have good polish with no scratches than best to buy boulder opal rough with thin color bars to see how good you can rub down and keep as much color as possible.

Some black opals may contain shells or fossils and these are best not cut or polished but left natural. Coober Pedy has more fossils and shells and these have been popular as inlay rough material or for making doublets and triplets. opal mining

Rough Opal For Experienced Cutters

Experienced cutters can then purchase black opal rough as a parcel lot. As with all rough it is best to cut the most promising piece rough last not first! Many cutters are keen to see what the rough opal will expose but its always best to do smaller pieces so you get a better feel for the parcel. This is not as easy as it sounds as most opal factories use expensive ultra sonic drills.

Diamond tip drills are now relativity inexpensive but a cutter needs to take care when pushing drills through to other side (especially when trying to make beads) as a hole needs to be made from both ends or opal can chip.

Rough Opals conceal dazzling beauty, a hint of which is revealed by dipping the stone in water (as the sellers do; your rough opal(s) will arrive dry). A basic saw blade and good polish are essential to revealing the beauty of a rough opal, as are patience and time. If polished correctly, some opals reveal a bright fire color. These dazzling color bars can be rubbed away if polished too roughly.

Opal-cutting lapidary machines are available for purchase but may not be necessary if you can make your own.

Rough opal can be sourced directly from opal miners and wholesalers/dealers. It is available from all the major Australian opal fields:

Ethiopian rough opals were hard to obtain as the government ban the export of Ethiopian rough around mid 2013 and only allow cut stones to be exported. Fortunately they have now changed this policy, although they have implemented high tax on exports.

What Opal Rough To Learn Opal Cutting And Polishing

Buying Rough Opal On The Internet

I have seen many new cutters go straight out and buy parcel rough black opal and start cutting. Unfortunately they rub away a lot of colour trying to get a good polish. This is due to three reasons. Firstly, lack of experience. Two, they don’t know how to polish and three, new wheels. Most cutters have new wheels and don’t realise how sharp these diamond tip wheels are and leave big scratches in the opal. So when they polished the colour bar is rubbed away.

It’s best is to start with rough opal from Koroit opal rough, Yowah opal rough, or Ethiopian rough and choose between middle to low grade opal rough. This is easy to polish as you don’t have to follow colour bars. It’s a little bit messy and you will get brown stains but you can tell when the polish is good on the opals.

Next is to try Coober Pedy white opal rough as they have thick colour bars to rub down. Then go and try boulder opal rough or black opal rough with thin colour bars.

Remember to always rub the worst looking rough in parcel, never start with the best promising pieces of rough. Pick out the best looking rough opal and leave it aside then rub and polish the lower grade. This will help you get the feel of the parcel. Sometimes cutters get the location of the top and bottom of the opal mixed up. So it’s best to experiment on low grade before you cut the good opals.

Buy volume parcels and get experience. If diamond wheels are too sharp, then try to rub down the wheel to get it smooth with any tough stone like Agate gemstone and make sure you rub down evenly with plenty of water.

Semi black or grey rough is good to start for Lightning Ridge material. Sometimes the centres of the rough are black, so if you’re cutting these go for a smaller black opal instead of large grey based opals.

Today the best way to buy opals is to buy on the internet or go direct to the opal fields in Australia and dig your own opal. In the past opal miners and opal wholesalers would visits shows like Tucson in USA but today these shows are so expensive to go as a seller. Booth and travel costs are well over $20,000 now, and that’s only for one person. Now opal miners and opal dealers prefer to offer you opals at wholesale prices from the internet. So make sure you buy from an opal dealer with good feedback and who stand behind their product. Most opal miners and opal wholesalers are honest, hard working, and have a genuine passion for opals.

Ask as many questions as your comfortable with as to where the opal came from and ask if the image is accurate like the picture.

SHOP FOR OPAL ROUGH

什么是最好的蛋白石粗糙学习蛋白石切割和抛光 本文旨在帮助各种技能水平的刀具选择最佳粗糙蛋白石进行切割和抛光。

将蛋白石从粗糙切割成成品石是非常有益的,但作为一个初学者,弄清楚什么类型的蛋白石粗糙选择似乎有点令人生畏。

首先,您需要蛋白石切割和抛光设备。基本的锯片和不同尺寸的抛光砂轮,从钢到橡胶浸渍不同等级的钻石和抛光轮。

让我们仔细看看一些选项。

粗蛋白石类型

从Koroit,埃塞俄比亚或Coober Pedy粗糙开始,混合的粗蛋白石价格在20美元到50美元左右。具有来自Koroit和Yowah蛋白石粗糙的良好图案的铁石是很好的学习抛光,如果你擦亮到坚硬你不会擦掉蛋白石颜色。 Yowah坚果是岩石形状并且具有强烈的颜色,但据说只有千分之一的颜色有任何颜色。

埃塞俄比亚粗蛋白石有厚色条,价格便宜,因为它价格便宜。因此,在您首次购买时首先采用平纹图案,并告知自己该蛋白石的水溶性,特别是在水中抛光时。

博尔德蛋白石有许多薄薄的颜色纹理,并且很难用新轮子抛光,这导致切割器摩擦掉大量的颜色,试图获得良好的光洁度。在某些情况下,Boulder蛋白石粗糙也需要通过将其放入锯切机中将其拆开。

从照明山脊粗糙的黑欧泊可能非常棘手。黑欧泊粗糙有两种形式,缝蛋白石或欧洲蛋白石。 Seam蛋白石是分层形成的,最好学习颜色条位于底部的底部。大多数这个potch是灰色的,有N4到N5的体色,蛋白石需要N4及以上的身体色调被归类为黑色蛋白石。在Cochran开采的大多数黑蛋白石被称为nobby蛋白石。这种蛋白石可能很昂贵,并且形成像带有彩条的岩石,并且可能难以阅读如何切割和抛光。许多刀具错误地向错误方向摩擦,因此在购买包裹时总是从最便宜的部件开始,看看颜色是如何面对的。即使尝试切割角度以暴露出最佳的火色,颜色的清晰度也比具有良好黑色蛋白石的尺寸更重要。许多蛋白石切割师会说他们购买的半粗蛋白石可以收支平衡或松散,但其他50%做得很好。

因此,当购买显示彩条的蛋白石时,你可能会想到为什么矿工没有擦掉它?所以粗糙的粗糙必须被视为赌博购买,但赢或放松它仍然是一个很好的爱好削减和抛光你自己的蛋白石和珠宝为家人和朋友。

下面的包裹在水晶中显示出很多蓝绿色。所有蛋白石矿工都寻找在potch上形成的颜色的爱好。 Potch基本上是蛋白石,有一种颜色,即白色,只有黑色等。我们想要找到的最常见的蛋白石类型是显示多种颜色的珍贵蛋白石。这些块中的一些将显示蛋白石条,但是在这种粗糙的条件下很难检查它们。较大的碎片在粗糙的切割轮上锯成两半,以露出任何颜色。

粗蛋白石

蛋白石粗糙的新刀具

新的蛋白石切割机最好从巨石铁矿石或Koroit蛋白石粗糙开始。另外,目前埃塞俄比亚粗蛋白石的价格仍然合理,而且水晶颜色条很厚,对新切割机来说也很好。

一旦你削减了几百个蛋白石并且没有划痕,而不是最好的购买巨石蛋白石粗糙的薄色条,看你有多好,你可以擦下来,尽可能多的颜色。

一些黑色蛋白石可能含有贝壳或化石,这些最好不要切割或抛光,但要保持自然。 Coober Pedy有更多的化石和贝壳,这些作为镶嵌粗糙材料或制作双层和三胞胎而广受欢迎。 蛋白石采矿

经验丰富的刀具粗糙蛋白石

经验丰富的切割机可以购买黑色蛋白石作为包裹批次。和所有粗糙一样,最好不要先切割最有希望的粗糙部分!许多切割机都很想看到粗糙的蛋白石会暴露出什么,但它总是最好做更小的碎片,这样你就可以更好地感受包裹。这并不像听起来那么容易,因为大多数蛋白石工厂都使用昂贵的超声波钻。

钻石尖钻现在相对便宜,但是当将钻头推到另一侧时(特别是当试图制造珠子时)需要小心,因为需要从两端或蛋白石芯片制造孔。

粗糙的蛋白石掩盖了令人眼花缭乱的美丽,通过将石头浸入水中(正如卖家所做的那样;你的粗蛋白石将会干燥)显露出一丝暗示。基本的锯片和良好的抛光对于揭示粗糙蛋白石的美感至关重要,耐心和时间也是如此。如果正确抛光,一些蛋白石会显示出明亮的火色。如果抛光太粗糙,可以擦掉这些耀眼的彩条。

蛋白石切割宝石机器可供购买,但如果您可以自己制造,可能没有必要。

粗蛋白石可直接来自蛋白石矿工和批发商/经销商。它可以从澳大利亚所有主要的蛋白石领域获得:

埃塞俄比亚的粗蛋白石很难获得,因为政府在2013年中期禁止出口埃塞俄比亚粗矿,只允许出口切割石。幸运的是,他们现在已经改变了这项政策,尽管他们已经对出口征收高税。

什么蛋白石粗略学习蛋白石切割和抛光

在互联网上购买粗蛋白石

我看到许多新刀具直接出售并购买包裹粗糙的黑色蛋白石并开始切割。不幸的是,为了获得良好的润色,他们擦掉了很多颜色。这是由于三个原因。首先,缺乏经验。二,他们不知道如何打磨和三,新车轮。大多数切割机都有新的轮子,并没有意识到这些金刚石尖轮有多尖锐,并且在蛋白石上留下了很大的划痕。因此,当他们抛光时,颜色条会被擦掉。

最好是从Koroit蛋白石粗糙,Yowah蛋白石粗糙或埃塞俄比亚粗糙的粗糙蛋白石开始,并选择中低档蛋白石粗糙。这很容易打磨,因为您不必遵循彩条。它有点乱,你会得到棕色污渍,但你可以告诉蛋白石的抛光效果。

接下来是尝试Coober Pedy白色蛋白石粗糙,因为他们有厚厚的颜色条擦。然后去尝试巨石蛋白石粗糙或黑色蛋白石粗糙与薄色条。

记得始终在包裹中擦拭最糟糕的粗糙,永远不要从最有前途的粗糙碎片开始。选择最好看的粗糙蛋白石,然后将其放在一边,然后擦拭和抛光较低等级。这将帮助您了解包裹的感觉。有时切割器会将蛋白石顶部和底部的位置混合起来。因此,在切好蛋白石之前,最好先进行低等级试验。

购买批量包裹并获得经验。如果金刚石砂轮太尖锐,那么试着用砂轮擦拭以使其像任何坚硬的石头如玛瑙宝石一样光滑,并确保用大量的水均匀地擦拭。

对于Lightning Ridge材料来说,半黑色或灰色粗糙是很好的开始。有时粗糙的中心是黑色的,所以如果你要切割它们,那就选择较小的黑色蛋白石而不是大的灰色蛋白石。

今天购买蛋白石的最佳方式是在互联网上购买或直接进入澳大利亚的蛋白石领域并挖掘自己的蛋白石。在过去,蛋白石矿工和蛋白石批发商会参观像美国图森这样的展览,但今天这些展览作为卖家来说是如此昂贵。现在展位和旅行费用已超过20,000美元,而这仅限于一个人。现在,蛋白石矿工和蛋白石经销商更愿意以互联网批发价格为您提供蛋白石。因此,请确保您从蛋白石经销商处购买并获得良好反馈并支持他们的产品。大多数蛋白石矿工和蛋白石批发商都诚实,勤奋,对蛋白石有着真正的热情。

询问与蛋白石来自哪里一样多的问题,并询问图像是否像图片一样准确。

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