The iridescent dance of hues and one-of-a-kind brilliance of opals make them one of the most alluring gemstones. Two of the most popular opal kinds, with their own unique qualities and charms, are those from Australia and Ethiopia, respectively.
Originating in different geological regions, opals from Ethiopia and Australia are quite different from one another in terms of their physical characteristics, beauty, durability, and monetary worth. Although both are highly sought after for their mesmerizing "play-of-color," they have unique qualities that cater to various tastes and have varied applications.
At Cove Jewellery, we celebrate the rich heritage of Australian opals. Explore our exquisite collection to find a piece of this timeless legacy.
Origin and Formation
Sedimentary rock strata, created millions of years ago when water rich in silica seeped into Earth's surface fissures and holes, are the most common places to find opals in Australia. A thick, non-porous structure is the end consequence of this long-lived process that often predates the dinosaurs. You can learn more about this fascinating geological process from sources like Geoscience Australia.
Lightning Ridge is well-known for its black opals. On the other hand, Coober Pedy is recognized for its white and crystal opals. Andamooka is famed for its boulder opals. Historically, Australia has provided approximately 90-95% of the world's opals.
Ethiopian opals
Opals from Ethiopia, on the other hand, have only just entered the market, with major finds starting in the mid-1990s, mostly in the Wollo and Shewa regions. Volcanic ash and tuff deposits near the surface of the Earth produce these opals at a faster rate. Their hydrophane nature and other distinctive features are shaped by this volcanic process.
Physical Properties and Appearance
Opals from Australia
Known to display a wide range of deep and bright colors, Australian opals are renowned for their constant and lively play-of-color. Different varieties of opals exist, such as boulder opals, white/crystal opals, black opals (which are highly sought-after due to their dark body tone that amplifies color contrast), and priceless opals. They have a wide color spectrum for their skin tone. When exposed to moisture, the appearance of most Australian opals does not change since they are not hydrophane.
Ethiopian opals
Translucent or translucent body tones let light flow through and highlight the interior hues of Ethiopian opals, which are noted for their stunning purity. Their colors pop, sometimes in unusual patterns like "honeycomb" or "harlequin." Although they exhibit a wide spectrum of hues, the earthy, warm tones of orange, yellow, and brown are their most distinctive. One defining characteristic is that they are hydrophane, which means that they are porous and can absorb water. This allows them to momentarily change their size, color, and transparency. After drying, the opal usually reverts to its original form, although cloudiness or irreversible alterations might result from prolonged contact with certain chemicals.
Durability
Opals from Australia are said to be more resilient and long-lasting than those from Ethiopia. Particularly hydrophane Ethiopian opals are more delicate and may be easily damaged by high temperatures, chemicals, and extended immersion in water. While Ethiopian opals are very breathtaking, they may need special care to keep them looking beautiful for a long time. For more on opal care, the Gemological Institute of America (GIA) provides expert guidance.
On the other hand, Australian opals are known to be more durable and may endure everyday usage without diminishing in beauty.
This exceptional durability makes Australian opals the perfect choice for timeless pieces like opal engagement rings and everyday wear.
Cost and Reputation
One other thing that might set things apart is the price. Because of their rarity and stellar reputation, Australian opals, especially black opals and those with unusual patterns, may fetch a premium price.
For those seeking to savor the allure of opals without the exorbitant cost linked to some Australian kinds, Ethiopian opals provide a more accessible alternative, since they tend to be less expensive. Opals from Ethiopia are famously clear and have unusual patterns, such as a "honeycomb" pattern, which set them apart. They may show off bright bursts of color and cover a wider spectrum of skin tones, from white to crystal to deep brown to red. Ethiopian opals are unique among gemstones because of their ability to absorb water, a process that may cause a transient alteration in their look and color.
Symbolism in Astrology
Both varieties of opal are said to have mystical qualities, and they are the birthstone for October. For people born under the Libra zodiac sign, opals are a stone representing harmony, balance, and emotional healing.
Ethical Sourcing
Environmental preservation and fair labor standards are ensured by severe rules that apply to the mining of Australian opals. While local populations in Ethiopia benefit economically from opal mining, the industry is not as well controlled, while there are initiatives to improve conditions.
Wrapping up
The choice between the traditional beauty of Australian opals and the vibrant hues of Ethiopian opals is a matter of taste. You can't go wrong with any kind of jewelry because of the special heritage and allure it brings. Buyers may make more educated decisions when choosing the ideal opal if they are familiar with the distinctions between these gemstones.
Ready to make your choice? As specialists in Australia's national gemstone, we invite you to browse our Australian Opal Collection, celebrated for its superior quality, durability, and timeless beauty.