處理中...
Ethiopian Opals Grading And Patterns
埃塞俄比亞蛋白石分級和模式
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處理中...

ethiopian opals grading and patternsEthiopian opal is one of the most diverse and spectacular types of opals on the market today. Since this type of opal is new, there is no industry accepted way to grade this type of opal like there is with the black opal. Black opal is grading in terms of blackness, the brightness of the colour and the pattern.

Similarly, Ethiopian opal is also graded on pattern and brightness, but the body tone of the stone does not play a huge role in determining the final value.

There are many unique patterns to Ethiopian Opals and on Opal Auctions the descriptions have to be accurate. One of the most popular patterns in Ethiopian opals is a naturally formed potch line with web inclusions known as honey comb pattern. This pattern is very rare in any other type of opals. These honeycomb shapes are also known on occasions to have brighter or different colour than the surrounding opal, this is also a rare occurrence in nature.

Color And Brightness In Ethiopian Welo Opal

This refers to the fire within the opal. The translucent internal fire of these Ethiopian opals have properties that make the fire look 3D. This 3 dimensional colour aspect is rare in most opals. It looks like fire has been captured within the opal.

Ethiopian Opals Grading And Patterns

Many Australian black opals have hidden colour spectrum patterns deep within the opal so a blue opal can have hidden translucent colour bars with violet or purple hues that cannot be directly seen by the naked eye. Ethiopian opals have vivid translucent colour bars and patterns that are strikingly bright and are visible with the naked eye.

Ethiopian Opals are valued based on their bright flashes of fire colour. The brighter and more intense the color, the higher the price of the opal. Stones with red flashes are rarer than the other colors while the green and blue flashes are more common.

Treated Ethiopian Black Opal

I was at the recent Bangkok gem show where I saw large amounts of Ethiopian black opal being sold with gem reports saying its natural. New findings have shown that most, if not all, of the “black” Ethiopian opal now seen in the market is not what it appears to be! It is either treated by innovative new “smoking” techniques to obtain it’s black-opal appearance. As this opal is hydrophane it seems to respond to smoking well. Smoking techniques are not new where opal is concerned, but what is now being used on the Ethiopian opal introduces a new twist to the old smoking method, which is why the treatment was missed by respected gem-testing laboratories.

Smoked Ethiopian Opal

The old technique was used on low quality opal, such as Mexican hydrophane material, to darken the colour of the base material, which causes — by contrast — a more fiery play of colour. It was done simply by wrapping the opal tightly in brown paper, placing it in a covered container, heating over medium heat until the paper is completely charred, then cooling and washing it. The result was a much prettier opal!

The other treatment that is common with Ethiopian Opal is altering the body color of the stone with dye. Some stones can be find to have a bright pnk or purple body color which has been artificially placed into the stone.

Dyed Ethiopian Opal

These are the only known treatment so far for Ethiopian opal and it greatly reduces the price of the stone. On Opal Auctions any treatments must be clearly stated. If you have any doubts remember to use our opal Sheriff service to get a second opinion.

The only other thing to be aware of is the fake Ethiopian opal that is on the market today. Read our article on detecting fake opals to help arm yourself with the knowledge needed to correctly identify fake Ethiopian opals.

Pattern In Ethiopian Opal

Ethiopian Opal has a wide range of beautiful patterns and shapes from oval to free-form. Black Opals from Australia are well documented with unique patterns from Mackerel to Harlequin. Similar names have been adopted to describe Ethiopian Opals. The most highly sought after and expensive pattern is the honey comb pattern.

Broad Pattern Crystal

Ethiopian Opals Grading And Patterns

Patchwork Rolling Flash

Ethiopian Opals Grading And Patterns

Patchwork Honeycomb

Ethiopian Opals Grading And Patterns

Hexagon Honeycomb or Fish Scale

Ethiopian Opals Grading And Patterns

Pin Fire Crystal

Ethiopian Opals Grading And Patterns

Neon Flash Pattern

Ethiopian Opals Grading And Patterns

Welo Broad Flash

Ethiopian Opals Grading And Patterns

Rainbow Pattern

Ethiopian Opals Grading And Patterns

Broad Patchwork

Ethiopian Opals Grading And Patterns

Multi Chaff Fireworks

Ethiopian Opals Grading And Patterns

Broad Flash Fire

Ethiopian Opals Grading And Patterns

Floral Eyes Pattern

Ethiopian Opals Grading And Patterns

Fire Cloud

Ethiopian Opals Grading And Patterns

Welo Patchwork Harlequin Pattern

Harlequin is regarded as the rarest pattern in the opal industry with Ethiopia having its own unique pattern-honeycomb pattern. Honey comb pattern is the most sort after pattern on cabochon Ethiopian opal. Many opal miners will never find one of these patterns in their lifetime of work.

True harlequin pattern is a mosaic broad pattern, angular close set of colours. Floral patterns are sometimes called floral harlequin but Welo Floral or Welo patchwork would be the correct naming for these gem Ethiopian floral pattern opals.

Ethiopian opal honeycomb patterns

Shop Ethiopian Opals

埃塞俄比亞蛋白石分級和模式埃塞俄比亞蛋白石是當今市場上最多樣化和最壯觀的蛋白石類型之一。由於這種類型的蛋白石是新的,沒有行業認可的方法來評定這種類型的蛋白石,就像黑蛋白石一樣。黑色蛋白石在黑度,顏色和圖案的亮度方面進行分級。

同樣, 埃塞俄比亞蛋白石也在圖案和亮度上進行分級,但是石頭的身體色調在確定最終價值方面並沒有發揮巨大作用。

埃塞俄比亞蛋白石和蛋白石拍賣有許多獨特的模式,描述必須準確。埃塞俄比亞蛋白石中最受歡迎的圖案之一是自然形成的具有網狀內含物的potch線,稱為蜂巢狀圖案。在任何其他類型的蛋白石中,這種模式非常罕見。這些蜂窩形狀有時也比周圍的蛋白石具有更亮或不同的顏色,這在自然界中也是罕見的。

埃塞俄比亞Welo蛋白石的顏色和亮度

這是指蛋白石內的火。這些埃塞俄比亞蛋白石的半透明內部火焰具有使火看起來像3D的特性。這種三維顏色方面在大多數蛋白石中很少見。看起來像是在蛋白石內捕獲了火。

埃塞俄比亞蛋白石分級和模式

許多澳大利亞黑蛋白石在蛋白石深處隱藏了色譜圖案,因此藍色蛋白石可以具有隱藏的半透明顏色條,其具有紫色或紫色色調,肉眼無法直接看到。埃塞俄比亞蛋白石具有生動的半透明色條和圖案,非常明亮,肉眼可見。

埃塞俄比亞蛋白石的價值基於其閃亮的火焰顏色。顏色越亮越強烈,蛋白石的價格越高。紅色閃光的石頭比其他顏色更罕見,而綠色和藍色閃光更常見。

經過處理的埃塞俄比亞黑歐泊

我參加了最近的曼谷寶石展,在那裡我看到大量的埃塞俄比亞黑蛋白石被出售,寶石報導說它很自然。新的研究結果表明,大多數(如果不是全部)現在在市場上出現的“黑色”埃塞俄比亞蛋白石並不像它看起來那樣!它要么採用創新的“吸煙”技術來獲得它的黑蛋白石外觀。由於這種蛋白石是hydrophane,它似乎對吸煙做出了很好的反應。在蛋白石方面,吸煙技術並不新鮮,但現在用於埃塞俄比亞蛋白石的方法為舊的吸煙方法帶來了新的轉折,這就是為什麼受到尊重的寶石檢測實驗室錯過了治療的原因。

煙熏埃塞俄比亞蛋白石

舊技術被用於低質量的蛋白石,例如墨西哥的氫化物材料,以使基礎材料的顏色變暗,相反,這導致更加火熱的顏色。簡單地將蛋白石緊緊地包裹在棕色紙中,將其放入有蓋的容器中,用中火加熱直至紙完全燒焦,然後冷卻並洗滌。結果是一個更漂亮的蛋白石!

與埃塞俄比亞蛋白石相同的另一種處理方法是用染料改變石頭的顏色。一些石頭可以被發現具有明亮的pnk或紫色的身體顏色,人工放置在石頭中。

染成埃塞俄比亞蛋白石

這是迄今為止埃塞俄比亞蛋白石唯一已知的治療方法,它大大降低了石頭的價格。在Opal Auctions上,必須明確說明任何治療方法。 如果您有任何疑問,請記得使用我們的蛋白石警長服務獲得第二意見。

唯一需要注意的是今天在市場上出售的假埃塞俄比亞蛋白石。閱讀我們關於檢測假蛋白石的文章,以幫助自己掌握正確識別假埃塞俄比亞蛋白石所需的知識。

埃塞俄比亞蛋白石的模式

埃塞俄比亞蛋白石有各種各樣的美麗圖案和形狀,從橢圓形到自由形態。來自澳大利亞的黑歐泊有很好的記錄,從Mackerel到Harlequin的獨特圖案。採用了類似的名稱來描述埃塞俄比亞蛋白石。最受追捧和昂貴的圖案是蜂巢圖案。

寬幅水晶

埃塞俄比亞蛋白石分級和模式

拼湊滾動Flash

埃塞俄比亞蛋白石分級和模式

拼布蜂窩

埃塞俄比亞蛋白石分級和模式

六角蜂窩或魚鱗

埃塞俄比亞蛋白石分級和模式

針火水晶

埃塞俄比亞蛋白石分級和模式

霓虹閃光模式

埃塞俄比亞蛋白石分級和模式

Welo Broad Flash

埃塞俄比亞蛋白石分級和模式

彩虹圖案

埃塞俄比亞蛋白石分級和模式

廣泛的拼湊而成

埃塞俄比亞蛋白石分級和模式

多糠煙花

埃塞俄比亞蛋白石分級和模式

廣泛閃火

埃塞俄比亞蛋白石分級和模式

花卉眼睛圖案

埃塞俄比亞蛋白石分級和模式

火雲

埃塞俄比亞蛋白石分級和模式

Welo拼湊而成的丑角圖案

Harlequin被認為是蛋白石行業中最稀有的圖案,埃塞俄比亞擁有自己獨特的圖案 - 蜂窩圖案。蜂蜜梳子圖案是凸圓形埃塞俄比亞蛋白石上的最後一種模式。許多蛋白石礦工在他們的一生工作中永遠不會找到這些模式中的一種。

真正的小丑圖案是馬賽克寬闊的圖案,角度緊密的顏色組。花卉圖案有時被稱為花卉丑角,但Welo Floral或Welo拼湊將成為這些寶石埃塞俄比亞花卉圖案蛋白石的正確命名。

埃塞俄比亞蛋白石蜂窩狀圖案

購買埃塞俄比亞蛋白石

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註釋

Srsw1srs

What I have seen at sites & at the gem shows is wholesale crystal (clear, or sometimes know as "jelly") is about $20-40 per carat for color & about $10. per for those with weaker & directional colors. Prices go up for darker base natural opal, with the larger stones commanding the most, of course. Multi-color, color saturated stones (especially with "3-D color & honeycomb characteristics) seem to bring the most, with commercial jewelry store dealers buying the $20-$40 per stones to set & sell with larger mark-ups in gold settings. (Same concept as with relatively inexpensive faceted colored stones).
Once in awhile I see "trunk sales" where a designer is hosted to a jewelry store that builds (creates) custom pieces with free-form, colorful Welo, or Boulder Opal, but rarely with the "high dollar" Australian Black Opal as it is just too expensive to be in the market place, except for the rich & famous. Just my two cents worth.  The trunk sales are attractive because the store does not have to buy & inventory, it just hosts the seller & takes a percentage of the sales that are concluded from the seller's trunk sale.

17th Jun
Opalplusadmin

In today’s market body tone is not as important as it was 3-5 years ago.
Today, Brightness and pattern are prime considerations.
Preference has been shown for unique pattern and than brightness and body tone last preference.
Ethiopian opals offer so good value in 10-20 carat category with good cabochon and full color direction
No other opal field can offer high domed cabochon opals with full direction of colors.
Unique patterns are in high demand from Honeycomb to snake pattern and no other gemstone has variety patterns as Ethiopian Opals

1st May
Drhelfert

In today's market, which body color is preferred?  I have seen Ethiopian Welo, Stayish and Shewa…clear, black and brown respectively.  Is there a preference?

29th Apr
Kasey2482

Thank you for sharing your knowledge on this seeming unknown stone.i have been fortunate to come in to possession of some nice Australia's hydraphane opal self prospected.most commonly know to come from Tintenbar.if you have any advise as to how to stabilise it so it can be worked that would be much appreciated.
Kind regards
Kasey

7th Jun 2019
Jdssicad

Very helpful!!  Wow, this is an easy, straightforward test that anyone can do, and it looks like a foolproof way to discern between Australian and Ethiopian opals.  Both are absolutely beautiful, but it's nice to know where they come from, and also good to be sure that the opals you buy are represented accurately.

20th Jan 2018
Naturalspectragems

Great Article. Very Insightful :)

10th Jan 2018
Bucsgirl47

I find it so sad the the Ethiopian Welo opal rough is so expensive compared to the low prices beautiful finished stones are getting.

26th Jul 2017
Mduem

Thank you for the insight!

5th Apr 2017
Dshaferb33

Great article! Thank you for sharing such valuable wisdom and knowledge!
Sincerely,
Denise Shafer

8th Mar 2017
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