26g Australian Cerussite with Pyromorphite Specimen 1B from Rum Jungle
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This large group of pieces were extracted in several trips between the 1970’s and 1990’s from the iconic location known worldwide - Rum Jungle, which is located 65 kilometres south of Darwin and 8 km north of Batchelor in the Northern Territory of Australia.
This piece weighs 26g and measures 2.5cm x 2.5cm x 2cm.
’Browns’ is a stratabound base metal deposit containing Pb-Cu-Co-Ni-Zn located in the Rum Jungle Mineral Field approximately 100 km south of Darwin in the Northern Territory, Australia. Browns Deposit, historically known as Browns Prospect, has been a source of mineral specimens for the commercial market since 1969.
At Brown's Prospect large masses of Malachite, Cerussite and Pyromorphite were found in a rich surface zone, and are highly sought after by collectors.
Since December 2012 there has been no further collecting. There is no doubt that additional specimen material remains but to access it would involve a significant lowering of the present water level in the pit followed by more earthworks.
According to Mindat the area’s name is attributed to the following story. In 1871 a bullock wagon delivering barrels of rum to construction gangs became bogged in jungle terrain near the head waters of the Finnis River. They proceeded to drink the rum in a week long party until they were rescued. The area became known as Rum Jungle.
In 1869, a government surveyor, George Goyder came across a green mineral in the area and noted it in his logbook, but the specimen remained unidentified. It wasn't until the 11th August 1949, when local prospector, Jack White, rediscovered the location, and identified the minerals to be Torbenite. It was the first uranium discovery in the Northern Territory, and Jack was given a $50,000 ($760,000 in 2009 dollars)reward for his efforts by the Australian Government.
The Commonwealth Government took control of the region in "National Interest" and made it a restricted area. Uranium mining commenced in 1953 and finished in 1971.
Cerussite:-
Cerussite is a lead ore whose name derives from the Latin word cerussa, meaning white lead. Since the 5th Century BC, the synthesized form of cerusite, lead carbonate, has been used as pigment in paintings. Today, cerussite is highly valued by collectors because of the stone’s brilliant sparkle, which comes from its high lead content.
Collectors also value the stone’s complex, twinned crystals. Cerussite can range in colour from white to grey, green, and black, but it is usually colorless. Cerussite has a beautiful adamantine, diamond-like lustre and can be transparent to translucent. It is a brittle and soft stone, rating only a 3 to 3.5 on the hardness scale. Because of its fragility, it must be handled with care. Cerussite is very difficult to cut and as a result, faceted cerussite gems are highly valued, however the softness of the gem makes it impossible to have any value as a gemstone. It is usually cut only for collectors only.
Cerussite is very helpful for stubborn people. It teaches the importance of short-term compromise and helps us adjust to situations where our inner resistance holds us back. Cerussite also teaches us how to be tactful in many different situations and helps us concentrate on our goals. It aids us in understanding why we are on this earth, what our tasks are, and what gifts we have that we can help the world with.
Sometimes Cerussite is confused with diamond and other colourless gems, however its most distinguishing quality, its high density, makes it easy to distinguish the stone upon further investigation. Cerussite has very intricately twinned structures. There are three types of shapes cerusite can have; chevron shapes are the ones found most, reticulated crystals are the most complex, and cyclic crystals create six pointed stars. Some of the most valued cerussite can be up to 2 feet tall, and is found in Tsumeb, in northern Namibia.
These crystals tend to be clear, transparent, and colourless, and are the most valuable form of cerussite. These are usually found around lead ores. Cerussite is of secondary origin, found in the oxidized zone of lead veins. It is found in association with many other minerals including anglesite, galena, smithsonite, promorphite and sphalerite. Non-colorless cerusite derives some of its colour from the minerals with which it is associated. For example, a cerussite sample rich in galena will appear grey, the colour of galena, while one rich in malachite will appear green, the colour of Malachite.
Pyromorphite:-
Pyromorphite is a rare mineral in the Apatite family, formed by the alteration of primary lead minerals, especially Galena, in an oxidised zone or supergene zone environment. Typically found as green, yellowish, brownish, greyish or white barrel-shaped hexagonal prisms, in clusters or as druses on matrix. The individual crystals are often modified or etched, giving a hopper-like appearance. This lead chloride phosphate forms a complete series with Mimetite (lead chloride arsenate), and also Vanadinite.
The name “pyromorphite” comes from two Greek terms: pyr meaning “fire” and morphe meaning “form.” Melted pyromorphite globules recrystallize as they cool, hence the name. German mineralogist Johann Friedrich Ludwig Hausmann chose the name in 1813. However, the first discovery came decades earlier.
Though some analyses happened prior, the first discovery credit goes to Swedish chemist Johan Gottschalk Wallerius, who found pyromorphite in Saxony, Germany, in 1748.
Wallerius had two names for it: grön blyspat for “green lead spar” and Minera plumbi viridis for “green lead mineral.” Within the next few years, a French name arose: mine de plomb verte for “green graphite.”
Because Pyromorphite comes in so many distinct colours and shapes, it took time for geologists to realise all their specimens were the same mineral. \nMore names for “new” minerals discovered to be pyromorphite — some you may recognise from previous sections — include:- Polysphaerite, Nuissierite, Miesite, Cherokine, Plumbeine & Sexagulit and Colliete.
Pyromorphite is a stone that activates and links one solar plexus and heart chakra together. One’s will becomes infused with the love and passion we carry in our hearts, making any goal or desire become achievable. This stone takes the saying “if there’s a will, there’s a way” to the next level. One will find that inner strength, and determination within when working with this stone. Pyromorphite helps one channel this energy towards your current intentions and pushes one into action in pursuit of one’s dreams.
Use the energy in Pyrmorphite to help you focus your mind on your current intentions in life and be reminded of the inner strength you truly poses. You are the creator of your own universe, and your actions will directly affect your life. Pyromorphite will provide you with the “batteries” to help keep you going until you feel your quest is complete.