Ethiopian 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.
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.
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.
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.
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.
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.
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.
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.
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El ópalo etíope es uno de los tipos de ópalos más diversos y espectaculares del mercado actual. Dado que este tipo de ópalo es nuevo, no existe una forma aceptada por la industria para clasificar este tipo de ópalo como el ópalo negro. El ópalo negro está clasificando en términos de negrura, el brillo del color y el patrón.
Del mismo modo, el ópalo etíope también se clasifica según el patrón y el brillo, pero el tono corporal de la piedra no desempeña un papel importante en la determinación del valor final.
Hay muchos patrones únicos para los ópalos etíopes y en las subastas Opal las descripciones deben ser precisas. Uno de los patrones más populares en los ópalos etíopes es una línea de potch formada naturalmente con inclusiones web conocidas como patrón de peine de miel. Este patrón es muy raro en cualquier otro tipo de ópalos. Estas formas de panal también se conocen en ocasiones por tener un color más brillante o diferente que el ópalo circundante, esto también es una ocurrencia rara en la naturaleza.
Esto se refiere al fuego dentro del ópalo. El fuego interno translúcido de estos ópalos etíopes tiene propiedades que hacen que el fuego se vea en 3D. Este aspecto de color tridimensional es raro en la mayoría de los ópalos. Parece que el fuego ha sido capturado dentro del ópalo.
Muchos ópalos negros australianos ocultan patrones de espectro de color en el interior del ópalo, por lo que un ópalo azul puede tener barras de color translúcidas ocultas con reflejos violáceos o morados que no se pueden ver directamente a simple vista. Los ópalos etíopes tienen barras y patrones de colores translúcidos vívidos que son llamativamente brillantes y son visibles a simple vista.
Los ópalos etíopes se valoran según sus brillantes destellos de color fuego. Cuanto más brillante e intenso sea el color, mayor será el precio del ópalo. Las piedras con destellos rojos son más raras que los otros colores, mientras que los destellos verdes y azules son más comunes.
Estuve en el reciente show de joyas de Bangkok donde vi grandes cantidades de ópalo negro de Etiopía que se vendían con informes de gemas diciendo que era natural. Nuevos hallazgos han demostrado que la mayoría, si no todos, del ópalo etíope "negro" ahora visto en el mercado no es lo que parece ser. O bien se trata con técnicas innovadoras de "fumar" para obtener su apariencia de ópalo negro. Como este ópalo es hidrófobo, parece responder bien al fumar. Las técnicas para fumar no son nuevas en lo que respecta al ópalo, pero lo que ahora se utiliza en el ópalo etíope introduce un nuevo giro en el antiguo método de fumar, que es el motivo por el cual los laboratorios de pruebas de gemas respetaron el tratamiento.
La técnica anterior se utilizaba en ópalos de baja calidad, como el material hidrophane mexicano, para oscurecer el color del material base, lo que causa, por contraste, un juego de color más ardiente. Se hizo simplemente envolviendo el ópalo firmemente en papel marrón, colocándolo en un recipiente tapado, calentando a fuego medio hasta que el papel esté completamente carbonizado, luego lo enfríe y lave. ¡El resultado fue un ópalo mucho más bonito!
El otro tratamiento que es común con el ópalo etíope es alterar el color del cuerpo de la piedra con tinte. Se puede encontrar que algunas piedras tienen un color pnk brillante o púrpura que se ha colocado artificialmente en la piedra.
Este es el único tratamiento conocido hasta ahora para el ópalo etíope y reduce en gran medida el precio de la piedra. En Opal Auctions cualquier tratamiento debe ser claramente establecido. Si tiene alguna duda, recuerde utilizar nuestro servicio opal Sheriff para obtener una segunda opinión.
La única otra cosa a tener en cuenta es el falso ópalo etíope que está en el mercado hoy en día. Lea nuestro artículo sobre detección de ópalos falsos para ayudarse a armarse con los conocimientos necesarios para identificar correctamente los ópalos etíopes falsos.
El ópalo etíope tiene una amplia gama de bellos diseños y formas, desde ovales hasta formas libres. Los ópalos negros de Australia están bien documentados con patrones únicos de Mackerel a Harlequin. Se han adoptado nombres similares para describir los ópalos etíopes. El patrón más buscado y caro es el patrón de panal de miel.
Arlequín es considerado como el patrón más raro en la industria del ópalo, con Etiopía teniendo su propio patrón único de panal de abejas. El patrón de peine de miel es el más ordenado después del patrón en ópalo etíope de cabujón. Muchos mineros opal nunca encontrarán uno de estos patrones en su vida de trabajo.
El verdadero patrón de arlequín es un patrón amplio de mosaico, un conjunto angular de colores. Los estampados florales a veces se llaman arlequín floral, pero Welo Floral o Welo patchwork sería el nombre correcto para estas gemas ópalos de motivos florales etíopes.
Comprar ópalos etíopes
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43 personas encontraron útil este artículoWhat 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.
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
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?
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
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.
I find it so sad the the Ethiopian Welo opal rough is so expensive compared to the low prices beautiful finished stones are getting.