處理中...
Australian Black Opal Information
澳大利亞黑歐泊信息
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處理中...

black opal informationHighly prized and sought after by kings, emperors, maharajas and sultans, the majestic opal has been desired throughout the ages. Its intrinsic beauty and ever-changing colours and patterns keep those who poses it spell bound. Many historic opals were crystal which tended to produce milky white colours not the bright flashes as the Black Opal above. The discovery of black opal in Australia in the late 1800’s with its bright colours changed the gemstone world. This new black opal became to be known as the ‘Queen of Gems’.

Lightning Ridge is the home of the beautiful black opal. It is nestled away among high ridges covered with scrub and pebbles. It is here that eons ago, nature hid the earth’s rarest gem, black opal. The beauty of the green trees, blue sky and red pebbles is reminiscent of the ever-changing colours of the magnificent opal found deep below. Unlike other gemstones no one opal is the same.

Australian Black Opal InformationSPEC the black opal dog miner Lightning Ridge 1990

Lightning Ridge, however, was not the first place to report black opal. It had been found in Egypt in 1899, two years before Jack Murray sank the first hole at the Nobby in 1901, at Jundah, Queensland and later at White Cliffs. But Lightning Ridge opal was different, and it is this difference that has made it famous. Until that time, the world had never seen such incredible patterns in opal on such a beautiful black back. The supply of black opal from Lightning Ridge dramatically changed the way gem merchants evaluated opals, setting an unprecedented hallmark for the gem. Black opal is the rarest and most valuable of all opals and is generally found as a bar of various colours in a dark body. In addition, there is also semi black and black crystal. Lightning Ridge in New South Wales is the worldwide home for black opal and is widely regarded as producing the best black opal in the world.

Australian Black Opal Mining

Black opal is getting harder and harder to find. Not only have fuel prices and lease fees made it very costly to mine for opal, but the scarcity of Black Opal is now a reality. This trend has been emerging for years, and it is now rare to find quality red fire black opal. The majority of opal being mined at Lightning Ridge is now seam opal, which is formed in bands similar to opals from Coober Pedy. Black opals that have formed as nuggets are now rare to find. Even the color base of black opals is different to years ago; the natural base is now more of a grey black color rather than dark black as it used to be. Miners are finding much more semi-black opal. Black opal color guides can be used to grade the darkness of a Black Opal. N5 is the darkest, and Hi the lightest.

Black Opal Investment

Black opal have always been the informed buyers top choice when selecting gemstones for investment. They have a strong red fire and a dark black base are considered extremely rare and as an investment will generally appreciate by at least 20% per year.

Many black opals sold on Opal Auctions have increased in value between 20 and 30% per year and some black opals valued at $1000 per carat have now increased to $3000 per carat. Investors in black opal should always look for top opals that have a black base.

Other factors include-

  • Cabochon shape (domed tops are ideal for Jewelry)
  • Uniqueness of the pattern and color. Red is most valuable but some orange and green fire ribbon patterns can also make for excellent investments.

Black opals have always been the favourite type of opal for serious collectors, but boulder opal has increased in popularity as well. The Japanese market tend to prefer black opal cabochons and have helped moderate an ongoing value increase for this opal type. One of our most expensive Australian Black Opal ever sold on Opal Auctions is a 37.30 carat Black Opal sold by Rollingstone Opals for $37,500. It is a gem fire Black Opal with body tone N1 and brightness rated at 5 out of 5.

Australian Black Opal Availability

There are a few spectacular opal collections in Australia but none that include a large Black Opal collection because they are so rare. This trend is repeated overseas, where large Opal collections can be found in several countries including the US, Hong Kong and Germany but a large collection of black opal is very rare indeed.

Black Opal Market Trends

With the ever increasing cost of opal mining mainly driven by oil prices and dwindling availability, the opal mining industry is coming under more and more pressure.

In Lightning Ridge all the “easy” mines have already been exhausted, and miners are facing very tough and dangerous mining conditions to extract opal in the more dangerous mines. Low grade black opal is steady and available so the common laws of supply and demand are in force.

Opalholics - now is the time to buy investment opal because the supply of high grade black opal is thinning, and the mining community of Lightning Ridge as a whole is not finding much opal, which can only mean one thing for prices.

How Black Opal is Graded and Sold

black opals

How would you set this black opal? As ring or pendant? If pendant which way would you face this opal ABCD? Opals have lot more decisions required than any other gemstone as each one is so unique and special.

Black Rough Opal parcels are sorted into three grades: tops, middle, and low. Each tops parcel has a King stone,which is the best stone in the parcel. Some parcels have several King stones. Color is the primary criteria for grading, but the graders also take into consideration the number of imperfections and faults, and whether a stone is the right shape to be cut into an oval or one of the other popular shapes. You can buy rough opal in several different conditions.

Mine Run. Direct from the opal mine. The stones have not been cut or ground down. This means that there is more guesswork in the cutting.

Purchasing mine run opal can be risky if you are not very experienced.

Off - Cuts. The miner has removed whatever opal he has a market for and sells you what’s left. With off cuts, you can usually tell what you are going to be able to cut. You must still watch for cracks in the opal because once a crack becomes obvious, a stone can lose half its value.

Rubs. This can often be the best way of buying rough if you are not very experienced. The miner has cut and ground the stones into basic shapes, after having removed most of the rubbish. What you have left is the stone nearly ready for the dopping and polishing process. You have the satisfaction of cutting your own stones without the high risk of buying mine run rough. Opal is officially sold in troy oz. There are approximately 30 grams to a troy oz and approximately 30-oz to a kilo.

Black opal mined from Lightning Ridge has always had good reputation for blue opals on black. These opals in the 1980s were common in the Cochran opal fields at Lightning Ridge and these were Nobby opals not seam opal, that is the opal was formed naturally in rock with black potch on top and bottom.

The seam opal has lighter black back and sometimes with grey or sandy potch on top. Black opal nobbies are best investment opal as from 1990s production of black nobbies has dramatically decreased and only seam opal is found today. We see less and less black opals with blue fire colours

Some blue opal from Lightning Ridge has magic electric blue fire and flash and also some best natural patterns of opals are in blue colour, from broad flash to block pattern and they are very attractive in white gold ring.

These days white gold jewellery is very popular and some crystal opals do not suit white gold jewellery but black opals blue colour are stunning, even set with diamonds they look so attractive to the eye, especially blue hues in a black opal. Black opal has promoted red fire opal as the best opal for investment.

Rating colour of black opals are as follows in regards to price per carat

  • Red
  • Orange
  • Green
  • Blue

However Blue opal has been under valued as investment opal, black opal with red fire has increased in value 50% per year over last 10 years. Black opal with cabochon and good flash has doubled that figure to make it the best investment colour if you had purchased blue fire opal 10 years ago

Also when purchasing opal over the internet always ask seller if opal is as bright as picture, so good idea to ask for picture of hand holding the opal as the picture cant be enhanced as the colour of skin looks different ,either greyish or pinkish looking means the picture has been enhanced

Opal is also rated in accordance to brightness. Body tone which is how the opal is visual is also measured from N 1as blackest to N9 as lightest opal. Also check with seller that the bottom of opal is clean, that’s is all natural potch ,black preferred to grey or if potch/sand is evident on bottom.

Lastly the more cabochon the opal also the more valuable, so flat opals are generally less expensive than well domed opals. Opals that are cabochon Jed reflect light better and rolling flash pattern is very popular as shows colour from all angles

Enjoy your own Black Opal!

黑歐泊信息國王,皇帝,王公和蘇丹倍受珍視和追捧,雄偉的蛋白石一直是人們所渴望的。它的內在美以及不斷變化的顏色和圖案使那些擺出姿勢的人感到迷惑不解。許多歷史悠久的蛋白石都是晶體,往往會產生乳白色,而不像上面的黑色蛋白石那樣產生明亮的閃爍。 1800年代後期在澳大利亞發現黑歐泊,其明亮的色彩改變了寶石的世界。這種新的黑蛋白石被稱為“寶石皇后”。

閃電嶺是美麗的黑蛋白石的故鄉。它坐落在覆蓋著灌木叢和鵝卵石的高脊之中。數年前,大自然就藏在這裡,是地球上最稀有的寶石,黑歐泊。綠樹,藍天和紅色鵝卵石的美麗讓人聯想到深處發現的宏偉蛋白石的顏色不斷變化。與其他寶石不同,沒有一個蛋白石是一樣的。

澳大利亞黑歐泊信息 SPEC黑貓狗礦工Lightning Ridge 1990

但是,閃電嶺並不是第一個報告黑歐泊的地方。它是在1899年在埃及發現的,距傑克·默里(Jack Murray)在1901年在諾比(Nobby),昆士蘭州的吉達(Jundah)和後來在白崖(White Cliffs)的第一個洞沉沒之前兩年。但是Lightning Ridge蛋白石卻有所不同,正是這種差異使它出名。在那之前,世界上從未見過如此美麗的黑背上如此驚人的蛋白石圖案。閃電嶺公司提供的黑蛋白石極大地改變了寶石商人評估蛋白石的方式,為寶石樹立了前所未有的標誌。黑蛋白石是所有蛋白石中最稀有和最有價值的,通常被發現為深色體內各種顏色的條。此外,還有半黑色和黑色水晶。新南威爾士州的閃電嶺(Lightning Ridge)是全世界黑蛋白石的家園,被廣泛認為是生產世界上最好的黑蛋白石的地方。

澳大利亞黑歐泊採礦

黑歐泊變得越來越難找到。不僅燃油價格和租賃費用使開採蛋白石變得非常昂貴,而且黑蛋白石的稀缺性現在已成為現實。這種趨勢已經出現多年了,現在很難找到優質的紅火黑蛋白石。現在在Lightning Ridge開采的大多數蛋白石是煤層蛋白石,形成的煤層類似於庫伯·佩迪(Coober Pedy)的蛋白石。形成為塊狀的黑蛋白石現在很少發現。甚至黑色蛋白石的顏色基數也與幾年前不同。現在的自然底色更多是灰黑色,而不是以前的深黑色。礦工們發現了更多的半黑蛋白石。黑色蛋白石顏色指南可用於對黑色蛋白石的暗度進行分級。 N5最暗,Hi最亮。

黑歐泊投資

在選擇寶石進行投資時,黑歐泊一直是知情買家的首選。它們具有強烈的紅色火焰和深黑色的底基,被認為極為罕見,並且通常每年至少可以使投資升值20%。

在Opal拍賣會上出售的許多黑歐泊的價值每年增加20%至30%,一些價值每克拉1000美元的黑歐泊現在已增至每克拉3000美元。黑蛋白石的投資者應始終尋找具有黑底的頂級蛋白石。

其他因素包括:

  • 凸圓形形狀(圓頂上裝是珠寶的理想選擇)
  • 圖案和顏色的唯一性。紅色是最有價值的,但是一些橙色和綠色的火帶狀圖案也可以帶來出色的投資。

黑色蛋白石一直是嚴肅收藏家最喜歡的蛋白石類型,但巨石蛋白石也越來越受歡迎。日本市場傾向於偏愛黑蛋白石凸圓形面,並幫助緩和了這種蛋白石的持續價值增長。澳大利亞蛋白石拍賣會上出售的最昂貴的澳大利亞黑蛋白石之一是37.30克拉的黑蛋白石,由滾石蛋白石以37,500美元的價格出售。這是一款寶石火黑歐泊,其主體色調為N1,亮度為5分(滿分5分)。

澳大利亞黑蛋白石的可用性

澳大利亞有一些壯觀的蛋白石收藏,但沒有一個包含大量的黑蛋白石收藏,因為它們非常稀有。這種趨勢在海外屢見不鮮,在美國,香港和德國等多個國家都可以找到大量的蛋白石,但實際上很少有大量的黑蛋白石。

黑歐泊市場趨勢

隨著石油價格和供應量的下降,蛋白石採礦成本不斷上漲,蛋白石採礦業正面臨越來越大的壓力。

在閃電嶺,所有“容易”的地雷都已經用盡,礦工正面臨著非常艱苦和危險的採礦條件,要在更危險的地雷中開採蛋白石。低品位的黑歐泊穩定且可用,因此有效的供求規律是有效的。

蛋白石-現在是購買投資蛋白石的時候了,因為高檔黑蛋白石的供應正在減少,整個閃電嶺的採礦社區並未發現太多蛋白石,這對價格僅意味著一件事。

黑歐泊如何分級和出售

黑蛋白石

您將如何設置這個黑色蛋白石?作為戒指或吊墜?如果是吊墜,您將以哪種方式面對這款蛋白石ABCD?蛋白石比其他寶石具有更多的決策要求,因為每個寶石都如此獨特和特殊。

黑色粗蛋白石包裹分為三個等級:最高,中等和最低。每個上層包裹都有一塊國王石,這是包裹中最好的一塊石頭。有些包裹有幾塊國王石。顏色是分級的主要標準,但分級者還考慮瑕疵和瑕疵的數量,以及石頭是切成橢圓形還是其他流行形狀之一的正確形狀。您可以在幾種不同的條件下購買粗蛋白石。

掃雷直接來自蛋白石礦。石頭沒有被切割或磨碎。這意味著在裁切中會有更多的猜測。

如果您不是非常有經驗,則購買礦用蛋白石可能會冒險。

關-削減。該礦工已經拆除了他擁有市場的任何蛋白石,並向您出售剩餘的蛋白石。有了削減,您通常可以告訴您將要削減的內容。您仍然必須注意蛋白石中的裂縫,因為一旦出現裂縫,一塊石頭就可能損失一半的價值。

擦。如果您不太有經驗,這通常是購買原石的最佳方法。去除大部分垃圾後,礦工將石頭切成基本形狀。您剩下的是即將準備好進行摻雜和拋光過程的石頭。您可以滿意地切割自己的石頭,而不必擔心購買雷電。蛋白石正式以金衡盎司出售。金衡盎司大約30克,一公斤大約30盎司。

從閃電嶺(Lightning Ridge)開采的黑蛋白石一直以黑色的藍蛋白石享譽盛名。這些蛋白石在1980年代常見於閃電嶺的科克倫蛋白石領域,它們是Nobby蛋白石而不是接縫蛋白石,也就是說,蛋白石是自然形成於岩石中的,頂部和底部均帶有黑槽。

接縫蛋白石的背面較黑,有時在頂部有灰色或沙質的墊子。黑色蛋白石是最好的投資蛋白石,因為從1990年代開始,黑色蛋白石的產量急劇下降,如今只發現了接縫蛋白石。我們看到越來越少的帶有藍色火焰色的黑色蛋白石

一些來自閃電嶺的藍蛋白石具有神奇的電藍色火焰和閃光,還有一些最佳的自然蛋白石圖案是藍色,從寬泛的閃光到塊狀圖案,它們在白金戒指中非常有吸引力。

如今,白金首飾非常流行,有些水晶蛋白石不適合白金首飾,但是黑色蛋白石的藍色令人驚嘆,甚至鑲嵌鑽石,它們看起來也是如此吸引人,尤其是黑色蛋白石中的藍色。黑蛋白石已將紅火蛋白石宣傳為最佳的投資蛋白石。

關於每克拉價格,黑歐泊的評級顏色如下

  • 紅色
  • 橙子
  • 綠色
  • 藍色

但是,藍歐泊已被低估為投資歐泊,在過去10年中,帶有紅火的黑歐泊的價值每年增長50%。如果您在10年前購買了藍火蛋白石,則具有凸圓形寶石和良好閃光效果的黑蛋白石會使該數字翻倍,使其成為最佳的投資色

另外,在互聯網上購買蛋白石時,總是要問賣方蛋白石是否像圖片一樣明亮,所以最好要求手持蛋白石的圖片,因為皮膚的顏色看起來不同,因此無法增強圖片的外觀,無論是灰色還是粉色圖片已經增強

蛋白石也根據亮度進行評級。還可以從最黑的N 1到最輕的蛋白石N9來測量蛋白石的視覺效果。另外,請與賣家確認蛋白石的底部是否乾淨,這是全天然鍋蓋,黑色優先於灰色,或者鍋蓋/沙底是否明顯。

最後,凸圓形的蛋白石也越有價值,因此,扁平的蛋白石通常比圓頂的蛋白石便宜。凸圓形寶石的蛋白石反射光線更好,並且滾動的閃爍圖案非常流行,因為它可以全方位顯示顏色

享受自己的黑歐泊!

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註釋

Debralee6511

Thanku for this information, packed with a wealth of Opal buying tidbits. Opal is my birthstone, I grew up only really seeing the milky white. I have very few pieces though because I was always told Opal isn't a "wear everyday" kinda stone. This year I purchased my first Boulder Opal Ring, and love it. They're so many different types of Opal's that I feel very "Special" being able to call this stunning, mysterious, incredibly beautiful stone my birthstone.. With so many options, how will my neck hold them all? Lol

24th Mar 2017
Opalplus

Hi Opaldragon   I bet you have seen massive increase in prices since you visited Australia.
US navy used dock Fremantle West Australia in 1990 and I would also take opals to sell with Quilpie opals on the dock.
The battleship Missouri visited Fremantle in 1991 and was great to view this famous battleship.
I see you bought opal ring from the John benny collection and can see you like top gem opals.
Hope you enjoy the fire in your opal ring

15th Jan 2017
Opaldragon1964

Been in lovesince age7 my mom had opal ring. I visited Australia several times in US Navy. Im collecting. Old guy at the pub said," dont buy as many black opals as you can afford, buy as many as you can carry! Im looking forward to recieving my latest purchase. So gday from the USA!

8th Jan 2017
Bizzee

I certainly hope one day I will be able to visit an Opal Mine in Australia. I am so fascinated by this natural beauty and am learning so much about the variety, colours and various places all over the world where Opals are mined. I am so glad I came across Opal Auctions and have even started a small but gorgeous collection of my own!

22nd May 2016
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