The Cartier building in New York was originally purchased through a string of Pearls. From the origins of history Pearl has been considered the “Pearl of Great Price.” Some of the values recorded throughout history are staggering, literally worth billions of dollars, using Pearls to even finance wars. The famous story of Cleopatra defeating Marc Antony at the “most expensive dinner in history” through the dissolving and drinking of a fabulous Pearl is an example of this! Learn more here!

Man-made, lab created, treated and cheated gems are a massive problem. These are everywhere! The biggest problem is that the tests to check them are sophisticated and expensive. Traders will always want to make a “quick buck” and as the trend for “throwaway” jewellery increases, we will only “Sell you what we tell you.” Learn more here!

YES! We absolutely guarantee our hallmarks. If a piece were to inadvertently slip through with the wrong hallmark this would be a major failure on the part of our quality control and would be something we would move very quickly to resolve! Learn more here!

Our silver is tested by sawing a sample piece in half. You have to get inside the metal to check the quality and percentage of silver in the alloy. The hallmark 925 will always contain 92.5% pure silver in the allow and we need to make sure this is always the case. The Rhodium plating is an additional step to add a brilliant finish to your piece. Learn more here!

Rhodium plating is very durable. It is incredibly expensive and beautiful. We offer a lifetime guarantee with all plating in that we will re-plate the item for life FOR FREE! (rhodium plating can cost up to $200 USD). Learn more here!

The Ethiopian Opal comes out of the ground looking like a brown beer bottle and requires substantial treatment to get it to show colour. The chemical treatment is effective but is not permanent. We have been contacted by numerous customers who have suffered the shock of this treatment being reversed. This is a problem that the World Bank suggests goes right back to a failure in policies set by the Ethiopian government. The customer is often not told about this….and this is the problem. Learn more here!

The manufacturing industry in some countries goes back thousands of years. It is often a form of “prejudice” to say that a country is “inferior” as a producer. For example, the CEO of Patek Phillip watches has stated publicly that the best movement in the world is a Seiko movement from Japan but (at $1,500) these will never achieve the $50,000 price of a Swiss watch?!?!?! What people should be upset about is if a person is abused, or exploited in the manufacture of the product (such as the Child slave labour cutting diamonds in Surat, India). It is not surprising that some of the best jewellers in the world are from India and China. Learn more here! 

The World’s Five Best Jewellers

We value integrity. We live in a world where banks are telling lies and stealing from customers. The original jewellers were bankers and the decline in morality may be the trend but it is not our trend. People are doing research and we are really excited that people are doing the checks online, researching the reviews and making sure that they get the facts! Learn more here!

Loose gems are basically a duty free item anywhere in the world. The rationale behind this is that someone is going to get a job back in your home country setting up the gemstone into a piece of jewellery. Learn more here!

The diamond industry is famous for being a transferable source of portable wealth. It is very difficult for customs agents to discern a million dollar ring on the finger of a traveller and using this method billions of dollars circulates through the world’s airports in a manner that would be impossible if it was “suitcases full of cash.” Diamonds are very much a means of cash transfer “under the radar.” Learn more here!

Native title has had a massive impact on the Australian Opal industry. In the Boulder Opal industry specifically, Native title has affected the method, procedure and process by which the miners operate. A direct result of the native title legislation is that miners are now required to gain permission from the council elders to mine what was once crown land. The negotiations may take many years to secure a native title agreement on a lease. Learn more here!

Opal is really starting to gain momentum all around the world as the “Queen of Gems.” This incredible position is growing despite the alleged efforts of De Beers to promote an “Opal is bad luck” myth. The allegation made against De Beers (by some) is that Sir Walter Scott was commissioned by De Beers to write the book “Anne of Guerstein” where Opal was presented as a gem of bad luck. This is the only place in history where this statement occurs! A book commissioned by Opal’s biggest competitor…the diamond industry! Learn more here!

Yes! We have had some wonderful commissions by the Australian Monarchists league for Prince William, Catherine and Camilla. We have had the wonderful privilege of providing an amazing Boulder Opal “split” to Prince William as a gift and have now got one half of the Opal in Kensington Palace and the other in our Pitt Street showroom in Sydney! Learn more here!

No one really knows how much Opal is potentially hidden in the Australian Outback. What we do know is that it is incredibly difficult to find and only occurs in tiny pockets. Opal is, and hopefully will always continue to, form new deposits…but where they are hidden is the mystery! Learn more here!

Global demand is growing but the supply is decreasing. Basic economics tells us that the result will be a net increase in value. The local Australian customer has (unfortunately) not had a great deal of exposure to the incredible colour and pattern of Australian Opal, but this is changing! Markets like China is also increasing the demand because Opal is so unique, making each jewellery piece eminently collectable. Learn more here!

It depends on the type of Opal being cut. White Opal is much easier to cut than Black or Boulder Opal because the Opal contains more colour through the ‘rough’. Crystal Opal can be incredible as you can (in rare instances) find pieces that are ‘skin-to-skin’ which is colour bars that are right through the Opal. Black Opal is extremely difficult to cut because the colour is difficult to find and often elusive. Learn more here!

Opal cutting is a very traditional process. Every Opal is hand-cut and there is no use of sophisticated cutting machinery. There are a number of steps involved and we have a very unique experience in the Sydney store where we invite guests to come and experience Opal cutting first hand. This is a unique experience and one that is truly enjoyable! Learn more here!

YES! The Opal miner knows exactly what is inside the parcel and will often sell rough Opal only because they know what is inside. The biggest ‘risk’ is where the ‘rough’ Opal looks great on the outside but when you cut it is not as impressive (because of cracks and/or a change in the colour bar to make it far less brilliant when ‘opened up’. Learn more here!

This is where the Opal has a distinct grey base tone on the “N-Scale”. Dark Opal is from one of the few Black Opal fields and will have a distinct grey base tone. When the colour is found in these they can be often as brilliant as the best Black Opals (but often substantially less expensive). Learn more here!

From a very humble beginning as a jewellery wholesaler with his father, Graeme Blaiklock has been involved in all areas of the Opal industry. While trends and traditions have changed the love, passion and commitment to this gemstone has not! Learn more here!

With over 80 years of combined experience, yes, we are considered world leaders in Opal!  Today, Australian Opal Cutters has had over 1 million customers from 32 Nations. Learn more here!

Black Opal with a ‘named pattern’ is arguably the most valuable commercially available gemstone on earth and there is a suggestion that this form of Opal is up to 5000 times rarer than diamond! Learn more here!

Price you forget but quality you have got to live with! A thing of beauty is a joy forever! The pain of paying a slightly higher price is nothing compared to the pain of living with poor quality. The tragedy with low price jewellery is that it will inevitably fail at some point! With Australian Opal Cutters You pay for quality, not simply because the piece has a ‘brand-name’. Learn more here!

Australia has been the world’s leading source of opal for over 150 years. It has produced ten times more opal than the rest of the world combined. Numerous world-famous localities in the country produce distinct varieties of opal. Precious, black, matrix, water, boulder, jelly, common, and other types of opal are all found in Australia.

The Jewellery trade has been a melting pot for millennia! The ebb and flow of gems, gold, trade is an insight into how advanced the Jewellery trade has been for so many centuries. Read about the Cheapside Hoard here!

We want to thank all of you who continue to send your guests into Australian Opal Cutters and Australian Pearl Divers! We know that you want your customers to have the best experience they can in Sydney. This is an absolutely unique, authentic experience that your guests will love!  Learn more here!

Andamooka is one of the early mining districts of South Australia. Commercial production began there in the 1920s. The area is famous for its matrix opal.

Opal that has been glued together, also known as mosaic, or composite opal.

“Black opal” is a term used for opal that has a dark body-tone color, often black or dark gray. It is naturally occurring rare and valuable solid opal formed in Iron oxide found in Lightning Ridge in Northern NSW.

Solid black opal which is transparent due to little or no iron oxide on the back. Viewed from the top, it compares at least with N3 in darkness rating

Solid black opal with the common blue covering the entire stone. Sometimes called “blue opal”, “Blue on black”. There are also forms of ‘fire Opal’ that have a light blue base colour or “Peruvian blue opal” mined in the country of Peru in South America. Although this stone is common opal that does not have a play-of-color, it is nevertheless very desirable because of its beautiful blue bodycolor.

Opal formed in cavities and cracks of ironstone, usually from Queensland, Australia.

A precious stone of convex hemispherical or oval form, polished but not cut into facets – the rounded surface of a cut stone.

Opals cut to standard dimensions (usually measured in millimeters)

This is a Standard to express the weight of gemstones. One carat equals 0.2 grams. Gem quality black opals can sell for more per carat than diamonds!

A type of opal pattern with criss-crossed strokes of colour looking like oriental Chinese characters.

The degree of transparency and clear colours and patterns of an opal.

Opal which does not show any play of color. Potch is another name for common opal and is found on the bottom of most opals.

“Contra-Luz” is a name used for a color-play that is visible when the light source is behind the stone. This effect only occurs in stones that are transparent or nearly transparent.

Coober Pedy is a small town in South Australia that was first settled in 1916 when mining for opals began. It was one of the early prolific producing areas and has earned the nickname of “Opal Capital of the World.” Coober Pedy is famous for producing white base-color opals, and production has continued uninterrupted since 1916.

Opal with a multitude of little lines that look like cracks. If they are actually colour bar separators then they are “Crazing” (As opposed to cracking). This is a natural phenomenon where iron oxide “lines” actually separate the Opal colours.

Transparent/translucent opal. Sometimes mistaken for “Light opal” found in Coober Pedy in South Australia.

Gem-quality opal from Ethiopia began entering the market in significant amounts starting in 1994. Since then, additional opal deposits have been discovered that would be large enough in size to take significant market share away from Australia, which has supplied nearly 100% of the opal market for over 100 years. Precious opal, fire opal, and very attractive common opal are all being produced in Ethiopia. They initially were becoming more abundant in the gem and jewelry market and more popular with consumers until customers became aware (over time) that the treatment processes with Ethiopian Opal (smoking and dying to increase the colour) can be reversed when the Opal comes into contact with household cleaning chemicals. When the Opal treatment is reversed a beautiful, bright multi-coloured gemstone will return to its original brown/grey base tone with very little colour visible.

Any Opal Colours which can be seen brightly even in semi-darkness or in the shade.

Most opal will glow or fluoresce weakly under an ultraviolet lamp. However, some specimens exhibit a spectacular fluorescence. Mossy common opal rough from Virgin Valley, Nevada fluoresces a brilliant green under UV light.

A naturally shaped opal – something other than an oval or round shape egg. Boulder opal cut generally in rectangular or triangular shapes to avoid unnecessary colour wastage.

“Harlequin opal” is a name given to an opal with patches of color in the shape of rectangles or diamonds.

Honduras is well known for producing a black, basalt-matrix opal that contains tiny vesicles filled with play-of-color opal. Most people who know opal will understand exactly what you are talking about if you use the term “Honduras Black Opal.”

“Imitation opals” are often made from plastic or a glassy material that is not silicon dioxide, and their play-of color is not produced by light passing through an array of tiny spheres. They are sometimes called “opalite” when sold in stores. These materials can have a very attractive appearance that looks very similar to opal. They are legitimate products if they are not advertised or sold in ways that inexperienced buyers will assume that they are buying natural opal.

“Louisiana opal” is a quartzite cemented with precious opal that has been mined in Vernon Parish, Louisiana. On close examination you can clearly see quartz grains with the spaces between them filled with a matrix of clear cement that produces a play-of-color in incident light. It is a stable material that can be cut into cabochons, spheres and other objects. Some of the material is brown but it also occurs in a gray to black color that makes the play-of-color easier to see.

Mexico is famous for being the world’s most important source of fire opal. Mexican fire opal is known for having the most saturated and purest hues. Mexican fire opal is cut into beautiful cabochons, and much is cut into brightly-colored faceted stones. Mexico also produces beautiful precious opal. A unique cutting style, known as cantera, yields cabochons that display pockets of fire opal in their rhyolite matrix. The cabochons have a bright red, orange or yellow background color.

“Mookaite” is the trade name for an opaque gem material with spectacular color patterns that is mined in Western Australia. Gemological testing identifies most mookaite as a chalcedony. However, some mookaite has the refractive index and specific gravity of opal.

“Morado” is the Spanish word for “purple.” Some common opal with a purple bodycolor produced in Mexico has been given the name “Morado Opal.”.

Because of opal’s beauty and desirability, people have been producing materials that look like opal for nearly a century. A person with a little experience can easily recognize most of the “look-alikes.” “Natural opal” is the name used for genuine opal that has been mined from the Earth. It is genuine opal made by nature and not by humans.

A Nodule of rough opal almost exclusively from Lightning Ridge

Opal doublets are assembled from a thin layer of precious opal glued to a backing of host rock (most often Boulder Opal). On the side view you can clearly usually see the very straight “glue line” between the two materials. If a Doublet is mounted in a setting with a cup bezel, it might be impossible to tell if it was a solid opal or a doublet Opal.

Opal triplets are produced by sandwiching a thin layer of precious opal between a backing of black obsidian and a cover made of clear synthetic spinel or quartz. The clear top acts like a magnifying lens and enhances the appearance of the thin precious layer. The black obsidian back provides a contrasting background that makes the play-of-color in the precious layer more obvious. If you look very closely at the edge of the gemstone stone, you will see a tiny line of color that is the edge of a thin slice of precious opal. If the Opal is set into a bezel you can carefully look through the surface at an angle to see if it is quartz (this is a fairly difficult detection method as the colour usually reflects very thoroughly throughout the quartz crystal cap).

Opalite is a name given to an impure variety of common opal that can contain plumes, moss or other inclusions. The name “opalite” can be confused with plastic or glassy materials – imitation opals – that are sold under the same name.

Opalized wood is a type of petrified wood that is composed of opal rather than chalcedony or another mineral material. It almost always consists of common opal, without play-of-color, but rare instances of petrified wood composed of precious opal are known. Petrified wood composed of opal is often thought to be composed of chalcedony because many people do not know that petrified wood can be opaline. These two types of silicified wood can be easily separated by testing their hardness, specific gravity, or refractive index.

Peru produces some of the world’s most beautiful common opal. It is not play-of-color opal; instead, it is common opal of uncommon color. Opal mines in Peru yield common opal in pastel colors of blue, green, and pink. Peruvian opal is also used to make beautiful cabochons and tumbled stones.

Highly valuable opal which shows a distinct image other than a pattern

“Pinfire opal” (also known as “Pinpoint opal”) is a name used for opal that has pinpoints of color throughout the stone.

Opal also occurs in shades of pink, common opal mined in Peru. The range in color is from nearly white, through carnation pink, through lilac.

Opal without any colour, also called Iron Oxide

This opal from Ethiopia has the orange-red body color that defines the category of “fire opal,” but it also contains play of colour, electric green to purple, making it a “precious fire opal.” Much of the Ethiopian opal currently being produced falls into this category however there is no test available to determine when an Ethiopian Opal has been treated with resin or dye to enhance the colour.

Opal in its natural state; as it comes out of the ground

Opal pieces initially shaped with waste material/sand removed but not yet cut and polished

Some opal does not exhibit a “play-of-color,” does not have a base color, and does not have a bodycolor like most common opals. But this material is still opal called “water opal” and “hyalite.”

Lightning Ridge is a town in North Western New South Wales (near the Queensland border in Australia). An area that has become world-famous for its deposits of black opal. More black opals have been produced at Lightning Ridge than at any other location in the world.

In 2008, NASA’s Mars Reconnaissance Orbiter has discovered a number of opal deposits on Mars. The ground the surface in an impact crater was found to be covered with hydrated silica rock debris that we would call “opal.” Mars researchers have also identified layers of opal exposed in the outcrops of crater walls. Since opal is a hydrated silicate its formation requires water. So, the discovery of opal on Mars is another evidence that water once existed on the planet. 

Prior to the establishment of the drill in 1987, shaft sinking was the most popular method for prospecting opal fields. Unfortunately, sinking shafts by hand was expensive and time consuming.

The introduction of the drill not only quickened the mining process but also offered a more cost-effective technique to sink shafts. The nine-inch diameter auger drill helped miners test for sandstone prior to sinking a shaft, rather than working blindly in an area.

Percussion drilling is similar to Auger drilling, however it is much more precise because it creates smaller holes and is consequently a more efficient way of finding and testing samples.

This modern mining technique is by far the most efficient means of testing a large area of ground. By using electrical currents to measure the rock’s electric resistance, miners can find where faults or sandstone could exist in the area.