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How To Cut And Polish Boulder Opal
如何切割和拋光博爾德蛋白石
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處理中...

how to cut and polish boulder opalIn this guide we will show you some top tricks to cutting Australian Boulder Opal. Boulder opal is opal that has a hard backing made of Ironstone with precious opal. The precious opal can be a thin layer on top of the Ironstone or it can be intertwined within the Ironstone.

Australian boulder opal from Queensland is a fascinating stone. Cutting boulder opals is a challenge but the results are usually breathtaking because the material is so hard it is difficult to make a cutting mistake so this type of material is good for novice cutters as well as experienced cutters.

Lets get stuck into a basic overview on how to cut and polish boulder opal.

equipment to cut and polish boulder opal

Equipment you Will Need:

  • Dop sticks
  • Dop wax or strong glue
  • Trim saw with thin
  • Blade (with rim thickness approximately 0.02”)
  • Diamond grinding wheels 80, 220, 600, 1200, and 3000 grits
  • Cutting equipment
  • Rough leather
  • Polishing disk
  • Tin oxide polish
  • Lamp with 100-watt bulb
  • Safety glasses
  • Dust mask
  • Old work clothes
  • Water supply

Preparation of rough opal cutting and polishing

Preparation Of The Rough Material:

1. Hand Pick Your Opals

Pick out the days work of opals you wish to polish. It is more efficientto cut multiple stones atthe same time as you will only need toset-upthe machine once. Selecting boulder opal to work with is a skill in itself. Like working with any other rough material the more you know the better. Make sure that the ironstone around the opal is fairly strong and free from cracks. Some reasonably low-grade material is good to start with. You might not end up with a beautiful stone but you can develop your systematic skill enough that you will be capable of cutting that attractive stone in any way you want.

2. Study The Opal And Saw It Up

Look for the pattern of the ironstone to provide you some clues about the path in which the seam will run. When Opal occurs in ironstone, it has flat and straight parallel lines along the matrix. There is a better chance that the opal will track this line.If the rough is soaked in water let it dry first so you can see where the Opal is running. Check for cracks running across the stone and again look for any imperfections throughout the stone. If there are cracks running through the stone you can use the saw to split the opal down the crack. This will avoid any problems later on.

Most of the rough material you will buy has already been slabbed up so you can clearly see the Opal layer. If they material iscompletelyrough and you cannot easily see the Opal you will need to saw the stone to expose the Opal layer.

The saw blade should always be under water. Use plenty of water to keep the dust down and the Opal cool. Never cut dry as opal will heat quickly and crack.

cutting boulder opal

3. Use Coarse Cutting Wheel To Remove Material

Now is the fun part. You will need a set of old clothes because it’s going to get dirty. Now that you have a fair idea of the course in which the seam will run it is time to rub it down. Having a combination of 80 and 220 grit wheel can make rubbing down the Opal much easier. use the coarse grit wheel to remove material quickly. Try not to get too close to the line of opal. The layer of opal can be unpredictable so try and stay just above the layer.

Rub down the ironstone opal

4. Study And Familiarize Yourself With The Opal

Now it is time to familiarize the Opal. You must decide which surface is going to be the top. Base your judgement on the form and layer of the opal, the coloring, brightness, and width of the surrounding material.

Try to make sure that the material directly below the Opal is as dark as possible. This dark setting will create the colors of the opal to stand out. If there is a thin cover of dark potch between the row of Opal and the ironstone it will make the stone pop. You must try to cut the stone so that this black coating will give the backdrop for your stone.

This kind of stone is referred to as a black boulder and can be quite radiant. It is also important that the boulder opal consists of a solid base. If the ironstone on other surface of opal is too lean, it will not offer the strength that is needed for the bottom of your stone.

Familirsie yourself with the opal

5. Rub Away The Ironstone

Now that you know which way the opal will face use the 220 and 280 grit wheel. You must not come into contact with the opal once you decided to use the 220-grit wheel as it can rapidly eliminate quite a bit of the vibrant materials.

It is also advisable to use light pressure ranging from 220-grit wheel as you getting closer to the opal. You must keep on eliminating ironstone until you are just about to display opal in one part of the surface. Occasionally, before you reach the opal, you will even notice that the color of the ironstone will change.

exposed color bar in opal

6. Rub Down To Expose The Opal

Switch over to the 600-grit wheel in order to expose some opal. At this period, you are not trying to eliminate all of the ironstone from the surface. You can do it by going back and forth between the 600-grit wheel with medium pressure. Use light pressure on the 280-grit wheel. Once you establish how the layer of opal operates, you can stop working on the top.

Cutting and Polishing the Opal

Cutting And Polishing the Opal:

Polishing wheels start at 120 grit diamond than rubber wheels 400 grit / 600 grit / 1400 grit before final polish.

1. Dop The Opal

First we need to get the stone onto a dop stick. When the stone is on the dop stick it is easier to manoeuvre and shape. Use the 220-grit wheel and flatten its reverse side tone.  The two most common ways to dop an opal is with Glue or using wax.

opals on a dop stick

2. Glue

The base of the stone must clean and dry. Apply one or two drops of glue to the dop sticks. Pre-heat the opal by resting it on the border of the dop pot for not more than 30 seconds.

Use light pressure to push the opal into the dop stick. The glue will dry after about 30 minutes. opals on a dob stick ready to polish opal

3. Wax

If the reverse side of the opal is spongy and the glue does not work you may use wax as an alternative. Heat the Opal and drop melted wax onto the opal before applying it the dop sticks. You must make sure the dop sticks have a sufficient amount of melted wax on them.

2. Setup Your Watering System

This is the step where you can cut the opal. If you’re using a device that re-circulates its water such as the water that is sprayed up onto the wheels, you can dripped down into a pan, then forced from that pan and sprayed up onto the wheels once more. Change the water and make the pans dirt-free regularly.

water setup for cutting opal

3. Pre-Form - Make The Decisions

At this point you are require to make some significant decisions. Look at the general appearance of your stone, both the ironstone and opal. Their combination can be relatively beautiful.

Keep on eliminating ironstone with the 600-grit wheel. Think about keeping the stone moving. The 600-grit wheel can still reduce opal and create smooth spots and scrapes. You can do a lot of things during this stage of cutting. You are eliminating scratches from previous stages.

Then, eliminating ironstone from the surface, and building the surface and form of the stone is pleasing to the eye. Check your stone and observe what it shows you. You might require going back the 280-grit wheel and changing its form. Once you have eliminated the big scratches and are pleased with the look, go to the 1200-grit wheel.

Polishing the opal

4. FinalizeThe Shape And Expose The Opal

In this step, the 1200-grit wheel will eliminate almost all noticeable scratches. It will not do much to modify the form of your stone, but it can better its form. Use reasonable pressure and make sure the stone is continually moving.

Stop regularly and clean up your stone to verify the progress and ensure that the scratches are completely vanishing.

Once you have removed the noticeable scratches, shift to the 3000-grit wheel, or if you’re not using a 3000-grit wheel, begin to clean your stone. If your device consists of a 14,000-grit wheel, it is advisable not to cut boulder opal. This wheel begins often with scratches.

5. Final Polish

The next phase is the process of polishing. In order to make it shine, you can use tin oxide for cleaning the foam-backed rough leather pad. Just lightly soaked it with water through the use of a spray bottle and with the running device running and spinning pad.

Also, use a brush to apply a well-stirred combination of water and tin oxide onto the moist pad. From here, the water mixture as well as, the tin oxide must be thin enough so that it does not clomp, and has the uniformity of thin gravy.

lapsa polishing compound

Just keep the opals stirring by turning the dop stick between your fingers and by varying the position of the pad. Do not allow the opal to get too hot. Sometimes, the coarse leather pad can seize your stone and pull it out of your hands. This is usually because the pad has dried out or if the stone has a rough surface or even pointed edges.

Polishing boulder opal

6. A Note On Matrix Boulder opal

if you are decide to polish a matrix opal, you can pursue the same process. The opal usually polishes, but the ironstone matrix will be dry. A helpful method is to clean the opal as explained, and then permit the pad dry faintly. Use more force while you maintain the stone moving, so that you can sense the stone to get even warm.

Remember that you are cleaning the matrix, not the opal spots of your stone. Be careful while heating the stone along your polishing pad, which can develop the finish of the matrix, but be, reminded that too much heat can break the opal. This method needs a bit of practice, but the outcomes can be worth it.

7. Finish The Back Of The Stone

Lastly you can do the finishing of the back. When you are completed polishing take the stone from its dop stick. You can use light to standard pressure for roughly about 220-280 for your grit wheel in order to take out any residue of the doping matter.

You must keep the stone flat against the wheel, but turn it slightly so that scratches will be avoided on its back. At this point, select what you prefer for the specific size of the stone. When you arrived with the suitable thickness, apply the 220 or 280-grit for the wheel that can be help to minimize chipping when setting.

You can either think the opal completed, or get a more finished look by taking the back through the remaining chain of finer wheels. You must cut the back portion of stones by means of 1200 or 3000-grit wheels.

8. The Finished Product

After all of the opals have been cut and polished they can be sorted and graded.

finished opals

Boulder opals make great pendants. All that is needed is a drill press to create a hole in the tip of them. Thread through a leather strap and you have yourself a beautiful boulder Opal necklace.

marking holes for drilling

Handy tip from opal cutter

A Handy Tip From An Opal Cutter

Worried about turning your machine on and off with wet hands? Try and glue a dop stick to the power board switch. That way nothing wet ever comes in contact with electricity. Brilliant.

switch board with dop sticks

Shop For Boulder Rough

如何切割和拋光巨石蛋白石在本指南中,我們將向您展示一些切割澳大利亞巨石蛋白石的重要技巧。博爾德蛋白石是具有堅硬的鐵石和珍貴蛋白石製成的蛋白石。珍貴的蛋白石可以在Ironstone上薄薄一層,也可以纏繞在Ironstone中。

來自昆士蘭州的澳大利亞巨石蛋白石令人著迷。切割巨石蛋白石是一個挑戰,但結果通常令人嘆為觀止,因為這種材料非常堅硬,很難犯下切割錯誤,因此這種類型的材料對於新手和有經驗的切割者都是很好的選擇。

讓我們深入了解如何切割和拋光巨石蛋白石。

切割和拋光巨石蛋白石的設備

您將需要的設備:

  • 摻雜棒
  • 摻雜蠟或強力膠
  • 修邊鋸
  • 刀片(輪輞厚度約為0.02英寸)
  • 金剛石砂輪80、220、600、1200和3000砂輪
  • 切割設備
  • 粗糙皮革
  • 拋光盤
  • 氧化錫拋光劑
  • 帶100瓦燈泡的燈
  • 護目鏡
  • 防塵口罩
  • 舊工作服
  • 水源

蛋白石切割和拋光的準備工作

粗料的製備:

1.手工挑選蛋白石

選擇您希望拋光的蛋白石的日常工作。同時切割多塊石頭的效率更高,因為您只需要設置一次機器即可。選擇巨石蛋白石本身就是一項技能。就像處理其他任何粗糙材料一樣,您越了解越多。確保蛋白石周圍的鐵石相當堅固並且沒有裂紋。最好從一些低檔材料開始。您可能不會最終得到一塊美麗的石頭,但是您可以充分地發展自己的系統技能,從而有能力以自己想要的任何方式切割那塊有吸引力的石頭。

2.研究蛋白石並看到它

尋找鐵礦石的圖案,為您提供有關接縫運行路徑的一些線索。當蛋白石出現在鐵礦石中時,它沿基質具有平直的平行線。蛋白石有更好的機會追踪這條線。如果將原石浸入水中,請先將其乾燥,這樣您就可以看到蛋白石的運行位置。檢查石頭上是否有裂紋,然後再次檢查整個石頭上是否有瑕疵。如果有裂縫貫穿石材,則可以使用鋸將蛋白石劈開。這樣可以避免以後出現任何問題。

您將要購買的大多數粗糙材料已經被壓扁了,因此您可以清楚地看到蛋白石層。如果它們的材料是完全粗糙的,並且您不能輕易看到蛋白石,則需要看一下石頭以露出蛋白石層。

鋸片應始終在水下。使用大量的水來保持灰塵和蛋白石的涼爽。切勿乾燥,因為蛋白石會迅速加熱並破裂。

切割巨石蛋白石

3.使用粗切輪去除材料

現在是有趣的部分。您將需要一套舊衣服,因為它會變髒。現在,您對接縫的加工路線有了一個清晰的認識,現在是時候將其磨掉。結合使用80和220砂輪可以更輕鬆地摩擦蛋白石。使用粗砂輪快速去除材料。盡量不要離蛋白石線太近。蛋白石的層可能是不可預測的,因此請嘗試使其停留在該層之上。

擦去鐵石蛋白石

4.學習並熟悉蛋白石

現在是時候熟悉蛋白石了。您必須確定哪個表面將成為頂部。根據蛋白石的形式和層數,周圍材料的顏色,亮度和寬度進行判斷。

嘗試確保蛋白石正下方的材料盡可能暗。這種深色設置將使蛋白石的顏色脫穎而出。如果一排蛋白石和鐵礦石之間有一層薄薄的深色鍋蓋,它將使石材流行。您必須嘗試切割石材,以便該黑色塗層為石材提供背景。

這種石頭被稱為黑色巨石,並且可能非常光彩。博爾德蛋白石由堅實的基礎組成也很重要。如果蛋白石其他表面上的鐵石太稀薄,它將無法提供石塊底部所需的強度。

Familirsie自己與蛋白石

5.擦掉鐵石

既然您已經知道蛋白石將面對哪種方式,請使用220和280砂輪。一旦決定使用220砂礫砂輪,就不得接觸蛋白石,因為它可以迅速消除相當多的充滿活力的材料。

當您靠近蛋白石時,建議使用220砂輪的輕壓力。您必須繼續清除鐵石,直到您要在表面的一部分中顯示蛋白石為止。有時候,在到達蛋白石之前,您甚至會注意到鐵礦石的顏色會改變。

蛋白石的裸色條

6.磨擦以暴露蛋白石

切換到600粗砂輪以露出一些蛋白石。在此期間,您不打算從表面清除所有鐵礦石。您可以在中等壓力下在600砂輪之間來回移動。在280粗砂輪上施加輕微壓力。一旦確定了蛋白石層的工作方式,就可以停止在頂部工作。

切割和拋光蛋白石

切割和拋光蛋白石:

拋光輪的鑽石起初為120目,而橡膠輪的最終拋光前為400目/ 600目/ 1400目。

1. Dop蛋白石

首先,我們需要將石頭放在摻雜棒上。當石頭放在摻雜棒上時,易於操縱和成形。使用220粗砂輪打平其背面色調。摻雜蛋白石的兩種最常見方法是使用膠水或使用蠟。

蛋白棒上的蛋白棒

2.膠水

石材的底部必須清潔並乾燥。將一兩滴膠水塗抹到Dop棒上。將蛋白石放在摻雜罐的邊緣不超過30秒,以對其進行預熱。

用輕微的壓力將蛋白石推入摻雜棒中。膠將在約30分鐘後變乾。 蛋白棒上的蛋白石準備擦亮蛋白石

3.蠟

如果蛋白石的背面是海綿狀且膠水不起作用,則可以使用蠟作為替代。加熱蛋白石,然後將熔化的蠟滴在蛋白石上,然後將其粘貼在棒上。您必須確保Dop棒上有足夠量的熔化蠟。

2.設置澆水系統

這是您可以切割蛋白石的步驟。如果您使用的是一種循環水的設備(例如噴灑到車輪上的水),則可以滴入一個油盤中,然後從該油盤上強行噴出並再次噴到車輪上。換水並定期清潔平底鍋。

切割蛋白石的水設置

3.預先表格-做出決定

此時,您需要做出一些重要的決定。查看鐵礦石和蛋白石的一般外觀。它們的組合可以相對漂亮。

繼續使用600砂輪清除鐵石。考慮讓石頭移動。 600粒度的砂輪仍可減少蛋白石並產生光滑的斑點和擦傷。在切割的這個階段,您可以做很多事情。您正在消除先前階段的刮痕。

然後,從表面上消除鐵石,並建立石頭的表面和形狀令人賞心悅目。檢查您的石頭,觀察它顯示的內容。您可能需要返回280粗砂輪並更改其形狀。消除大的划痕並對外觀感到滿意後,請轉到1200砂輪。

拋光蛋白石

4.最終確定形狀並暴露蛋白石

在此步驟中,1200砂輪將消除幾乎所有明顯的划痕。修改石頭的形狀不會有多大作用,但可以改善其形狀。使用合理的壓力,並確保石頭不斷移動。

定期停止並清理石材以核實進度,並確保划痕完全消失。

清除明顯的划痕後,請轉到3000粗砂輪,或者如果您不使用3000粗砂輪,請開始清潔石材。如果您的設備由14,000粒度的砂輪組成,建議不要切割卵石蛋白石。該輪子通常以划痕開始。

5.最終波蘭語

下一階段是拋光過程。為了使它發光,可以使用氧化錫清潔泡沫支持的粗糙皮革墊。只需通過使用噴霧瓶以及運行裝置的運行和旋轉墊將其輕輕浸入水中即可。

另外,用刷子將水和氧化錫充分攪拌的混合物塗在濕墊上。從這裡開始,水混合物以及氧化錫必須足夠薄,以使其不會凝結,並具有均勻的肉汁稀薄度。

拉帕拋光劑

只需在手指之間轉動Dop棒並改變打擊墊的位置即可保持蛋白石攪拌。不要讓蛋白石變得太熱。有時,粗糙的皮革墊會抓住您的石頭並將其從您的手中拉出。這通常是因為墊已經乾了,或者是石頭表面粗糙甚至邊緣都是尖銳的。

拋光巨石蛋白石

6.關於矩陣巨石蛋白石的註釋

如果您決定拋光基質蛋白石,則可以執行相同的過程。蛋白石通常會打磨,但鐵礦石基質會變乾。一種有用的方法是按照說明清潔蛋白石,然後使墊微弱乾燥。在保持石頭運動的同時,用力更大,這樣您就可以感覺到石頭變得更加溫暖。

請記住,您是在清潔基質,而不是清潔石頭的蛋白石斑點。沿拋光墊加熱石材時要小心,這會增加基質的光潔度,但要提醒您的是,過多的熱量會破壞蛋白石。這種方法需要一些實踐,但結果值得。

7.完成石頭的背面

最後,您可以對背面進行整理。完成拋光後,請從其摻雜棒中取出石材。對於砂輪,您可以在標準壓力下使用大約220-280的光,以除去任何殘留的摻雜物。

您必須將石頭平放在車輪上,但要稍微轉動它,以免刮傷其背面。在這一點上,選擇您想要的特定石頭尺寸。當到達合適的厚度時,為砂輪塗上220或280砂礫,這有助於在設置時最大程度地減少碎裂。

您可以認為蛋白石已完成,也可以通過將剩餘的較細砂輪鏈拉回去來獲得更完整的外觀。您必須使用1200或3000粒度的砂輪切割石頭的後部。

8.成品

在所有蛋白石都經過切割和拋光後,可以對其進行分類和分級。

成品蛋白石

博爾德蛋白石製成精美的墜飾。所需要的只是一台鑽床,以便在鑽頭的頂端開一個孔。穿過皮帶,您將擁有一條美麗的巨石蛋白石項鍊。

打孔標記

蛋白石切割器的方便尖端

蛋白石切割機的便捷提示

是否擔心用濕手打開和關閉機器?嘗試將Dop棒粘在電源板開關上。這樣,就不會有濕的東西與電接觸。輝煌。

帶有Dop棒的開關板

購買巨石粗糙

此文本是機器翻譯的。 顯示原圖?

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評論

Yannick

Tks so much ,very helpful ! I start with confidence !

21st Nov 2020
A-Z Of Opals

A-Z Of Opals

A complete list of your favourite Opal from all over the world
19文章
Did you know?

Did you know?

Check out our fascinating information and articles on all things amazing in the Opal world
37文章
How To's

How To's

All of your favourite Opal How To's
18文章
News

News

What's trending in the Opal Industry
40文章
Opal Auctions  Verified Sellers

Opal Auctions Verified Sellers

Opal Auctions sellers who are approved as opal Verified Sellers
4文章
Opal Information

Opal Information

Information about Opal and its colorful history
101文章
Opal Stories

Opal Stories

Feel like reading a yarn or two?
6文章
Technical Opal Information

Technical Opal Information

All there is to know about Opals including Black Opals, Ethiopian Opals & Boulder Opal
14文章
Testimonials

Testimonials

Feedback from our VIP customers
5文章