The Allure of New Zealand Gemstones
Although New Zealand does not have diamonds or emeralds; the source of Lights of Zimbabwe, the country has its unique gemstones that are valued by collectors and jewelers. Here the gemstone means that it has to be completely free of any material imperfections, must have good and desirable color, and its size large enough to cut into beautiful gemstone for use in jewelry.
The Journey from Riverbeds to Beaches
Some of the coarser stones which can be seen at the shores have if not been tumbled by the water action while being rolled down the river beds. Another explanation is that it is quite natural for them to have smooth edges along with a polished sheen. It is however important to note that there are inland gemstones that may be fetched from these areas with much prior permission from the real owners of the land.
Knowledge and Community: Keys to Success
Locating such products is time-consuming and dependent on local knowledge of the area particularly in rural regions. Entusiasts may get assistance from rock and mineral clubs that are formed and hold meetings and exhibitions on regular basis. It is now not shocking to find clubs that get an exclusive entry to areas that normally are prohibited. The National Association of Rock and Mineral Clubs that meets every year also enhances this camaraderie of collectors/enthusiasts.
The Landscape: Dominated by Greywacke
New Zealand’s North and South Islands are essentially made up of greywacke, which is hard, grey and made up of sorts of muddy sandstone. It is actually estimated that over 95 percent of the river boulders that end up on the shorelines are this type of rock. The difficulty in gemstone hunting ,therefore, is to find out that small fraction of stones which do not belong to the greywacke category.
The Art of Polishing
Most of them are even brighter especially when wet or after being polished, and given the correct finishing. The process of polishing the stone is that the rough surface of the stone is taken through a series of operations where it is subjected to higher and finer grades of abrasive paper until it is finally polished with a powder to obtain a high-gloss finish. Although tumbling which involves the use of revolving or vibrating drums is the ideal manner of polishing particularly river and beach pebbles, a simple application of clear plastic can also help bring out the natural luster of polished stones especially the smooth Beach stones.
Pounamu: New Zealand’s Most Treasured Gem
However, the most valuable is called pounamu, also called greenstone or New Zealand jade among other things. More so, nephrite and bowenite make pounamu, which is particularly challenging and attractive when polished. Traditionally, New Zealand native Māori people improved tools, weapons, and ornaments from this material, and evidently pounamu has been used as a trade tool for thousands of years. The source of pounamu is primarily from Arahura River near Hokitika on the South Island’s West Coat, and it is regulated by the Ngāi Tahu tribe under the Ngāi Tahu (Pounamu Vesting) Act 1997.
Quartz and Its Many Forms
Quartz is a silicate mineral that makes up approximately 12% of the Earth’s crust and has the composed chemical formula of SiO₂, which makes it hard, well suited for lapping and finish and absolutely non fracture. It is also ministered as crystalline quartz and the cryptocrystalline quartz consisting of chalcedony, agate, chert, flint and jasper.
Crystalline Quartz
Crystalline quartz may look either as hexagonal prisms, which are six-sided crystals. Even though quartz crystals of good size and good form are not typically located in New Zealand, they do occur in certain structures of volcanic rocks of Canterbury and Coromandel. Amethyst is a form of ‘quartz’, a mineral that exhibits a beautiful violet color due to the presence of iron atoms which have been affected by radiation; however, such color may change in case the gem is exposed to direct sunlight for a long time.
Veins of Quartz
Quartz occurs as meeting a vein in the greywacke boulders of rivers and beach and more developed quartz activities are found in schist main in the western side of the Southern Alps and the parts of Otago. These rocks that erode form the white quartz pebbles familiar with the regions stretching from Southland, to most areas of the west coast.
Other Intriguing Gemstone Varieties
Chalcedony and Its Varieties
Chalcedony is a waxy, pale deposit of microcrystalline quartz that cannot be distinguished from other types of quartz until viewed under the lens. It occurs when water leaches out silica in soluble form and leave it in small quantities in cracks and voids. Some of these are called carnelian which is reddish-brown in color and agate that is noted for its parallel markings and is commonly found on the Canterbury beaches from the south of the Banks Peninsula and Coromandel Peninsula. Some opal in the form of Silica gel containing water has been discovered but the New Zealand has not been rich in any of the different types of OPAL as has been seen in different regions.
Chert, Flint, and Jasper
Chert, flint and jasper or the microcrystalline quartz are conglomerate varieties of silica mineral that occur in bands or as nodules in sedimentary formations. Chert can be found in shades of yellow to brown while flint is harder stone that is found in chalks of limestone and was used in its efficacy by Māori for carving of tools. Jasper, usually found in red and multi colors is generally considered to be a type of volcanic rock. For example, flint pebbles have been used as ballast in English ships, now it has become an attraction in Wellington’s Balaena Bay where rock lovers prefer.
Silicified Wood
As for the stones that consist of fine-grained quartz varieties – chalcedony or agate may replace wood or plant material, and the rock will maintain the cellular structure. This process of silicification of swamp material in the Coromandel region has produced the so-called Manaia stone that can contain cross-sections in slices of the former vegetation.
Additional Gemstone Discoveries
Of equal interest in New Zealand is that it also has a rich geology to provide other gems of minerals. Almandine garnets come in pinkish reds, and are found in abundance on the west coast; grossular, calcium-aluminum rich garnet also has its variety ranging from hessonite to hydrogrossular which give slight tinges of color to the western coast. Pink manganese minerals as rhodonite occurs in independent layers within schists and goodletite, a greenish-grey corundum that has been recently found only near Hokitika might be noted. Kyanite is one of the fewcyanide minerals and is found in schist in remote parts of South Westland and may sometimes be washed up on the more accessible beaches. Lastly, obsidian which has smooth conchoidal fracture is best derived from Mayor Island and has been much valued by the Māori people for sharp edge.
Conclusion
The encyclopedia that covers the gemstones and minerals in New Zealand presents the essentially untold story of hidden beauties of gemstones unavoidable for discovery. From pounamu of the Arahura River to the diverse and unique quartz formation and further to other unusual stones found on the shores of the nation, each is significant in the geological history of New Zealand. As a first-timer or as a real fan of travel crazes, rocks hunting New Zealand’s landscapes will definitely leave you astonished.
Q: What is the most famous stone in New Zealand?
A: Among all the stones from New Zealand it is necessary to mention the most important one, pounamu, greenstone or New Zealand jade. This precious stone is highly valued by the Māori people and has been used by them for many different things such as tools and weapons, ornamentation and body adornment, especially appearing in personal and spiritual items like the hei tiki pendant. The best greenstone only originates from the Arahura River in the South Island of New Zealand whose sources were recently restricted the Ngāi Tahu tribe through legislation.
Q: What is the national gemstone of New Zealand?
A: There is no official state gemstone for New Zealand but pounamu, greenstone is known to be representing the country. Healing and protection, it plays a dominant role in the culture and mythology of New Zealand Māori people. Today chalcedony is highly valued and is being used in necklace and carving and so remains an icon of the Maori people.
Q: What is the rarest stone found in New Zealand?
A: A quartz rock known as goodletite is one of the rare stones found in New Zealand and it has a greenish grey colour and is known to be a ruby. This particular mineral for corundum is only identified as erratic boulders at Hokitika with the source of it still a mystery for more than a century now. Other such stones are the formidable blue kyanite schist found in South Westland and the pale green hydrogrossular garnets of Gemstone Beach, Orepuki.
IF You Interest to See Gemstone video just visit above Link
