The Black Star of Queensland Famous Black Sapphire Gemstone

Black Star of Queensland

Origin of Name

The Name Black Star of Queensland reflects both the nature of the gemstone and its place of origin. The 733-carat Black Star of Queensland is the largest black star sapphire in the world, and was discovered in the 1930s in the Anakie Sapphire fields of the Rubyvale area in the State of Queensland, in northeastern Australia.


The Black Star of Queensland-Famous Black Sapphire Gemstone


Characteristics of the stone

The 733-carat Black Star sapphire is an oval-shaped gemstone cut as a cabochon like all other star sapphires, but the rays or legs of the star are not as long as the normal blue star sapphire and other colored star sapphires, which extend from the center to the girdle. The rays in blue star sapphires are also fairly thin and narrow and tapers towards the girdle. On the other hand, the rays of this black star sapphire are shorter and thicker extending about half way from the center towards the girdle. The rays are not of equal length; some are shorter than the others. However, the center of the star is much bigger and brighter than the normal star sapphires. The appearance of the bright six-rayed star in a totally black background is amazingly beautiful. The beauty of the stone is further enhanced by its white gold setting in which the large black stone is surrounded by a row of 35 pear-shaped smaller white diamonds. The color contrast is indeed breathtaking. Like all other star sapphires the star moves with changing angles of illumination and observation.

The black star sapphire like all other sapphires belong to the group of minerals known as corundum, a crystalline form of aluminum oxide (Al2O3), that is after diamond, the hardest known natural substance, with a hardness of 9 on the mohs scale. Corundum crystallizes in the hexagonal system, resulting in pyramidal or rounded barrel shapes. Like diamonds, corundum was formed billions of years ago deep inside the earth, below the earth’s crust and in the mantle, under conditions of high temperature and pressure. Subsequently, when the magma cooled down it formed igneous rock deposits and the corundum was incorporated in these deposits. Later as the igneous rocks were transformed into sedimentary and metamorphic rocks the corundum was also incorporated into these rocks. Continuous weathering and erosion of the rocks over millions of years released the corundum crystals which were washed down the hills and deposited in the flood pains of rivers as alluvial deposits.

In the pure state corundum is colorless, like pure diamonds which are also colorless. However the incorporation of trace quantities of impurities in the crystal structure of corundum, causes a wide range of colors, which includes all the colors of the rainbow such as violet, indigo, blue, green, yellow, orange, red and pink. Others colors include gray, brown and black. All colors of corundum except red are known as sapphires. Red corundum is known as ruby. The common color in sapphires is blue. Other colors such as violet, green, yellow, orange and pink are known as fancy colored sapphires. The blue color in sapphire is caused by trace quantities of iron and titanium. Green color is caused by traces of nickel, orange color by traces of chromium and iron.

The Black Star of Queensland,Famous Black Sapphire Gemstone

The star effect or asterism in star sapphires is caused by abundant microscopic inclusions mainly rutile, a natural form of titanium oxide (TiO2), aligned in a three fold pattern inside the stone that reflects the light entering the stone through its dome shaped face, into a six-rayed star pattern.

Accidental discovery of the rough stone and its use as a door stop

The Black Star of Queensland was a gem of enormous size weighing over a thousand carats and once thought to be worthless and used as a door stop for over a decade, but today has turned out to become one of the priceless gemstones in the world.

The enormous gemstone was discovered accidentally in 1938 by a young boy of around 12 years named Roy Spencer when he was playing around in the claim where his father used to prospect for sapphires, known as the Reward claim, which lies within the Anakie Sapphire fields in the Rubyvale area, in the State of Queensland. The Anakie Sapphire fields is the largest of all sapphire mining areas in Australia with an area of around 900 sq. km. Immediately after picking up the enormous black crystal the boy lost no time in running back home to show his accidental find, to his father Mr. Harry Spencer, who was one of the pioneering miners of the central Queensland gemfields. Mr. Harry Spencer was not impressed, and after examining the enormous black crystal just threw it aside, saying it was just a large black crystal. Perhaps it was not known at that time that sapphires could also exist as black gemstones. The enormous black crystal was then fortunately used as a door stop, in the Harry Spencer household for around a decade, without being thrown away as something worthless


Realization of the true value of the stone

After about a decade Mr Harry Spencer came to know that sapphires do indeed exist sometimes as black gemstones, and may be worth quite a fortune depending on its quality. He subjected the humble black stone, that had served him well for almost a decade as a door stop, to thorough examination and realized that it may be worth a fortune. He weighed the stone and found that it weighed an enormous 1,156 carats. Mr Spencer was quite sure of the quality of the stone, but was not experienced enough to detect that the stone could eventually be transformed into a star sapphire. The humble door stop that was treated with scant respect for almost a decade, was suddenly elevated to a higher status, and began receiving royal treatment from the poor miner. The gemstone was washed well and wiped and kept in a safe place, until a prospective buyer could be found.


The sale of the rough black stone to Harry Kazanjian

The word got around quickly that an enormous gem-quality rough black sapphire was available for sale, and in 1947, the Armenian-born jeweler Harry Kazanjian traveled all the way from his adopted home town of Los Angeles, in California, to have a look at the sapphire with a view of purchasing it. Harry Kazanjian examined the enormous black stone and was impressed, and immediately started negotiations with Harry Spencer for the purchase of the gemstone. Finally Harry Kazanjian agreed to pay $ 18,000 for the gemstone, which Harry Spencer accepted. The agreed amount was duly paid, and the black stone which had remained in the Spencer household for almost 10 years, changed hands.


Cutting of the rough black stone into a black star sapphire

With the money realized Harry Spencer was able to construct a new house for his family. Harry Kazanjian carried the rough gemstone to Los Angeles, where he studied the sapphire for at least two months. Through his long years of experience in examining rough stones Harry Kazangian was convinced of the hidden asterism in the rough stone, and accordingly cut the stone as an oval cabochon, sacrificing 423 carats of the rough stone. The finished black sapphire that weighed 733 carats, revealed a brilliant six-pointed star when exposed to natural or artificial light. Like all other star sapphires the star was more pronounced when the source of light, such as direct rays of sunlight or light originating from a pen torch, was directed straight at the dome-shaped face of the stone. Cutting a star sapphire is an expert job, and needs experience and special skills. A wrong judgment or an error may result in a failed star, or a star with some rays missing or star displaced to a side. The estimated value of the expertly cut black star sapphire was $ 1 million in the year 1949.


The black star sapphire brings luck to the Kazanjian family

Since the purchase of the black star sapphire in 1947, the business of the Kazanjian family boomed, and they eventually became one of the leading gem dealers in the world. The family attributed the success achieved in their business to the luck brought in by the black star sapphire. Thus the Kazanjian family held on to the black gemstone for a long time in spite of several attractive offers to purchase the stone. During the period of their ownership the Kazanjian family was generous enough to loan the priceless gemstone to the Natural History Museum of the Smithsonian Institution in Washington DC, in 1969, to be put on display together with the Hope diamond, the largest blue diamond in the world, which is of Indian origin, but presently belongs to the Institution.


Sale of the Black Star of Queensland by the Kazanjian family

The Kazanjian family retained the Black Star of Queensland for a long time not only because of its mystical value as a stone of good fortune, but also because of its rare and unique beauty as the largest black star sapphire in the world. However they eventually parted with the stone, when they received an attractive offer from a customer who had previously seen the stone as a young man and was now desperate to own it, as he had promised his mother at that time that he would purchase the Black Star for her one day. The customer who wished to remain anonymous was very eager to fulfill his childhood promise to his beloved mother. Details of the transaction such as purchase price, the date of purchase, the identity of the buyer etc had not been disclosed.

In the year 2002, the Black Star of Queensland was sold again by its anonymous owner to another anonymous buyer, who became the fourth owner of the stone after its original owner Mr. Harry Spencer. The sale price of the sapphire was not disclosed but the estimated value of the sapphire at that time was around $ 100 million.


Display of the Black Star Sapphire of Queensland at the Royal Ontario Museum

In the year 2007, the new owner of the Black Star Sapphire of Queensland, who purchased it in 2002 from its anonymous owner, loaned the rare gemstone to the Royal Ontario Museum of Canada, for an exhibition organized in connection with the Architectural Opening and Building Dedication of the Michael Lee-Chin Crystal on June 2nd 2007, an ultra modern building designed by the architect Daniel Libeskind. This is the second time the unique gemstone had gone on display after its first display in 1969, at the Natural History Museum of the Smithsonian Institution, at Washington DC. The Black Star of Queensland was exhibited with the surrounding band of 35 smaller white diamonds, and was the centerpiece of a general exhibit, that explained all aspects of the gemstone known as sapphires, such as their chemistry and structure, how sapphires were formed in nature, the distribution of sapphires in the world, the mining of sapphires, and the importance attached to sapphires in different cultures.


The Black Star of Queensland again on offer for sale

The Black Star of Queensland is said to be on offer for sale again, by the current owners of the sapphire. The reserve price placed on the rare black star sapphire is $ 88 million.


History of the Anakie sapphire fields.

The name Anakie is derived from a local aboriginal word, meaning two hills. Anakie is a small township on the Capricorn highway, 305 km west of Rockhampton, a city closer to the east coast of New South Wales, and 651 km northwest of Brisbane. It is sparsely populated, with a few houses a few hotel-motels, a railway station, and a few insignificant roads. Anakie is said to be the “Gateway to the Gemfields,” as it is situated on the Capricorn Highway, and the main east-west railroad, with a railway station. The roads linking the other important gem mining areas of Rubyvale and Sapphire meet the Capricorn Highway at Anakie. Anyone who wishes to reach Rubyvale or Sapphire, had to reach Anakie first either by railroad, or along the Capricorn Highway, before proceeding northwards towards sapphire and rubyvale.

Gems were first discovered in the Anakie area in 1875, by Archibald John Richardson, who found zircons at the Retreat Creek. In the following year another prospector discovered sapphires in the region. Word got around that sapphires were found in the region, and a steady stream of prospectors began moving into the region. By the year 1881, commercial mining operations had commenced in the region. In the year 1884, the new railway line passed through the region, giving an added boost to the mining activities in the region. In 1887, Anakie was declared as a township. In the year 1902, Anakie Sapphire Fields were officially proclaimed as a mining area.

In 1906, the mining towns of Anakie, Rubyvale and Sapphire saw its first boom, when gold miners in large numbers from Clermont, moved west, to try their luck in the mining of sapphires, and the result was that in 1907 the total value of the sapphires mined exceeded £ 40,000. In the year 1922, the Queensland Government intervened to stabilize the sales of the blue sapphires. The boom lasted until 1935, when production began to decline, and the mines were abandoned one by one until in 1953 only around 20 full timers were left in the area. It was during this period of decline in production that the world’s largest black star sapphire, the Black Star of Queensland was discovered.

The Sapphire Mining Fields of Central Queensland Australia

The square area shown in the map is enlarged below

Map Showing Central Highlands of Queensland ,Rubyvale,Anakie,Sapphire and Capricon Highway


In the 1960s interest in the gem fields of the area was re-kindled due to a boost in tourist arrivals, and the consequent interest shown in fossicking for gems. Significant quantities of sapphires were mined by fossickers during this decade. But, in the early 1970s the Government handed over the fields to big time operators who began exploitation of the fields using heavy machinery. The area designated for this large-scale operation lay between Rubyvale and Sapphire. Production of sapphires increased significantly and most of the production reached the south-east Asian market. However, as expected the large-scale operation caused significant environmental damage, and most of the countryside was converted into bizarre moonscapes. Initially, a conflict of interests arose between the small-time operators and the big exploiters, but today, the fields have become a true combination of interests, with individual operators, tourists, and companies, operating in their own designated areas, and vying for the beautiful stones.

15 thoughts on “The Black Star of Queensland Famous Black Sapphire Gemstone

  1. Dr Shihaan says:

    Here is the answer to a question asked by a user:

    After reading the article on the Black Sapphire of Queensland and the amount of money that it brought in 2002, I wanted to ask Dr. Shihaan of his opinion what the “Black Sapphire of Queensland” would be appraised for today?


    Thank you very much for the question regarding the black star sapphire.

    Actually it is not known for how much the stone was sold by the anonymous owner in 2002.The estimate of 100 million dollars was quoted by several leading newspapers, but they did not quote their source either.

    Considering the enormous size and the perfect star, I am not surprised at the estimate.

    Take a look at the current prices of black star sapphires:These are the prices of smaller black star sapphires.

    >1.0carats 3 to 10 US$ per carat

    >1.0–4.99carats 10 to 50 US$ per carat

    5.0carats + 30 to 100 US$ per carat (golden stars may reach US$ 200 per carat).

    The Black Star of Queensland is the only large black star sapphire in the World, it is the only one of its kind in the world.There are numerous large star rubies and large star blue sapphires in many museums and private collections of the world.

    The usual sizes of black star sapphires is less than 5 carats, making the black star of Queensland an extremely rare gemstone.It is highly unlikely that another one of this size will be found even in the future.

    In my opinion it is difficult to estimate the present value, being an extraordinary stone it cant be compared to market value, because black sapphire stones of such enormous size and quality are not available in the market. The price will be determined by the highest bidder (auction) for the gemstone.

    Please feel free to contact me if you have any further questions/comments on this gemstone or any other gemstones/diamonds.

  2. Nadeem says:

    Someone sent me a test report from Dubai for 3 Star Sapphire stones, 1 Blue (204 Carat) one Black (120 Carat) one black again (50 carat). is it really possible to have such stones. If yes what may be the estimated value of such stones

  3. Coco Renaud says:

    I know a man named Jack that says he was the owner of the big black stone and that harry winston kept it from him. He eventually settled with Winston. But I’m not sure what the settlement was for. he went on to purchase Liz Taylors old house in the calif. desert. Just wondering if you could verify the price the stone finally went for.

  4. Coco Renaud says:

    I heard that the big black stone was finally transferred to Winston. Can you find out what the settlement was?

    My friend Jack was a co-owner. Just wondering the ‘worth” today. Winston was keeping it hostage and finally got it. For a pretty price i’m sure.


  5. jo woods says:

    HI there, a friend of mine just had a star sapphire cut it is about 25 carat it has 2 perfect stars on it one bronze and the other blue directly sitting on top of each other like a 12 point star one leg of star blue the next bronze etc..he has been told that this is very rare, maybe priceless stone, hope this makes sense, cant find any info at all, what do you think without seeing stone, can you help



  7. victor says:

    I have a very large piece of raw black star saphire. It weighs about 16 oz and is about the size of the palm of my hand. I am interested in knowing more about it and I am also wondering if you buy stones
    Thank you

  8. Dennis says:

    I have ” triple black star sapphire ” in one stone, how to show you the foto? Could you give comments to the stone and the value of it? The stone is app.6 cts.
    Thank you.

  9. micheal says:

    i have a very large black stone that i found on the side of a creak bed near Emerald Qld just after the 2010/2011 floods. it is still souranded by what i think is some sort of opal and clay and durt. any ideas on who i could contact to get more info about this rock?

  10. nkuke mantai says:

    iam happy to know the story of black star sapphre i currently have few stones with golden star 10ct+roughhow can i get good buyer

  11. Ak gandhimathi says:

    I want to share and I have lot of doubt in gemstones so please give me full detail how to join in the side.Please reply me I gave you email id.Thanks………….

  12. Ak gandhimathi says:

    I have big size star ruby and star sapphire .In one star color is brownish pink In the weight of the stone is approximate 700 ct cabochon very nice astrisam six rays is very nice.Please tell me how the rate of the stone

  13. Duane (Dewey) Graff says:

    Was the Queensland Black Star Sapphire ever offer for sale by Harry Winston? If so, any details?

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