October doesn’t simply have one birthstone, however two. The primary of the October birthstones is the opal, and the second is tourmaline. What these two birthstones have in frequent is that they each have the widest and most numerous coloration ranges on the planet of gem stones. What’s extra, they not solely happen in uniform colours however in a wide range of coloration mixtures.
On this article, we’ll inform you every little thing it’s worthwhile to find out about these two October birthstones.
What are the Birthstones for October?
Two gem stones signify the month of October: opal and tourmaline. Each of those birthstone choices are well-known for holding quite a lot of coloration decisions.
Opal is a mineraloid, a sort of hydrated silica. In different phrases, opal has a certain quantity of water in it (from 6 to twenty%). Primary geographic sources of opal embody Ethiopia and Australia. There are two forms of opals – valuable and customary. Treasured opals can show iridescence, in any other case referred to as a play-of-color. This gemstone may be translucent, clear, or opaque, and it may seem in virtually any hue, from completely different colours of the rainbow to grey and black.
Tourmaline is a silicate mineral that consists of crystalline boron. It might include concentrations of iron, aluminum, magnesium, potassium, lithium, and sodium. Since it may have a mixture of all these parts, tourmalines nearly happen in virtually each coloration, from vivid purple to colorless. In reality, tourmalines show extra colours and coloration mixtures than every other gemstone. They sometimes come from metamorphic and igneous rocks mined in Brazil and Africa. In contrast to opals, which kind in low temperatures, tourmalines often kind by hydrothermal exercise and scorching temperatures.
Each these October birthstones are fairly well-liked and make lovely items of jewellery. Whereas they’re an inexpensive various to diamonds and pricier valuable stones, they will nonetheless command excessive costs as properly.
Myths and Historical past of October Birthstones
The utilization of opals, in addition to individuals’s deep appreciation for them, can hint itself to Historic Rome. Since it may show all kinds of colours directly, opal’s connotation was all the time associated to magic, psychological energy, and the supernatural.
As a result of their colourful properties, opals have an affiliation with volcanoes, the moon, lightning, fireworks, constellations, and galaxies. They function an inspiration to writers, poets, and painters, and had been particularly favorable to royalty. It’s even the nationwide gemstone of Australia. Immediately, opal is a logo of purity, hope, and abundance.
The title tourmaline means “unknown gemstone of blended colours,” a time period that comes from Sri Lanka. Tourmalines have been mistaken for different colourful gem stones for hundreds of years. Since they happen in nearly any coloration, individuals thought they had been emeralds, rubies, sapphires, and different gem stones. It wasn’t till the 1800s that tourmalines had been categorised as separate mineral teams. For instance, a latest discovery introduced proof that among the well-known Russian crown jewels had been in reality tourmalines and never rubies.
Attention-grabbing Factoid: The primary-ever tourmalines had been considered “Brazilian emeralds.”
What units the tourmaline aside from all different coloured gem stones is that it may be electrically charged. As a result of its pyroelectric properties, it earned the nickname “the Ceylonese Sri Lankan Magnet.” The commonest tourmalines are black.
Tourmalines can signify a number of completely different meanings, primarily relying on their coloration. For instance, pink tourmaline is a logo of compassion and affection, whereas purple tourmaline represents knowledge and energy. Regardless of the coloration, many imagine that tourmalines have psychological and bodily therapeutic properties. Some even thought that the colourful tourmalines got here from rainbows.
Mining Areas of Opal and Tourmaline
The primary sources of opal are mines in Australia and Ethiopia.
Australia, particularly, has produced as much as 95% of valuable opals in the entire world. In reality, opal is the nationwide gem of Australia.
The Australian mine that produces nearly all of opals is Coober Pedy. The Coober Pedy is the mine of the most important opal dicovery, the Olympic Australis. Weighing roughly 17,000 carats, this single opal has a worth of AUD$2.5m.
Other than Australia and Ethiopia, opal deposits mines are in the Virgin Valley in Nevada, the Czech Republic, Mexico, Indonesia, Canada, Idaho, Slovakia, Turkey, Brazil, Hungary, and many different locations.
Rock opals can happen virtually anyplace, together with sandstone, limonite, marland, basalt, and rhyolite.
The primary supply of tourmaline is Brazil, which has a report of manufacturing tourmalines in virtually each coloration. Different mining places of the tourmaline embody Maine, Nigeria, California, India, Mozambique, Sri Lanka, Tanzania, Indonesia, Kenya, Malawi, Namibia, Madagascar, Pakistan, and different nations. All these deposits produced tourmalines of various colours. For instance, the tourmalines that come from Maine are both pink or inexperienced. Californian tourmalines have a mixture of those two colours, in any other case referred to as bi-colors.
A new and not too long ago discovered sort of tourmaline known as Paraiba tourmaline primarily comes from Brazil. They’re vivid blue and vivid inexperienced, and consultants take into account them to be essentially the most priceless forms of tourmalines.
Bodily Properties of Opal and Tourmaline
Bodily Properties of Opal
What makes opal distinctive is the play-of-color that it shows on its floor. This phenomenon happens as a consequence of grids of microscopic silica spheres, that are solely 0.2 microns in dimension. The diffraction of sunshine causes it to alter colours relying on the angle you’re viewing it from. Opals which have this means are known as valuable opals. Widespread opals, then again, naturally have an opaque “hazy” coloration, with bluish or greenish hues. They’re also called “milk” opals.
One other attention-grabbing truth about opal is that it comprises water in its silica construction. It might include as much as 20% water, making it softer than different gem stones. In reality, opal has a hardness from 5.5 to six.0 on the Mohs scale.
With regards to coloration, opals can happen in a myriad of colours directly, making them really distinctive. A particular sort of opal is named a hearth opal, because it shows a purple hue with orange and yellow undertones. The rarest and Most worthy forms of opals are black opals.
Bodily Properties of Tourmaline
Since tourmalines are simply confused with different gem stones, it’s necessary to know which distinctive bodily properties they’ve. Although tourmalines belong to essentially the most advanced group of silicate minerals, when it comes to chemical composition, what units them aside from different gem stones is their triagonal crystal construction. In different phrases, they include three-sided or six-sided prisms with rounded edges.
As talked about earlier than, tourmalines can happen in virtually each coloration. Whereas black opals are the rarest, black tourmalines are the most typical. They’re in any other case referred to as schorl, and they’re wealthy in iron. Pink and purple tourmalines are additionally extensively out there, and so they’re in any other case referred to as rubellites. A particular sort of tourmaline is named watermelon tourmaline. As a result of multicolor zoning that happens throughout the mineral, most of these tourmalines have a pink core, surrounded by a inexperienced outer layer.
What additionally makes tourmalines particular is that they are often electrically charged when excessive warmth or stress is utilized to them. Some forms of tourmalines, primarily these which can be opaque black and yellow, have excessive magnetic susceptibilities.
October Birthstones in Jewellery
Opals have been worn in jewellery for hundreds of years. The earliest opal artifacts ever discovered date again to 4000 BC, and so they’re believed to come back from Kenya. Even to at the present time, they’re very talked-about due to their intricate patterns. Individuals love sporting opal jewellery as a result of no two opals are the identical, making every bit of jewellery fully distinctive.
Treasured opals are sometimes worn as rings, brooches, earrings, and necklaces. The larger the stone, the higher its play-of-color. They’re often lower in a technique to maximize the color-changing sample, even when it makes the opal disproportional. Opals which have a dome-shaped floor, that are additionally the most effective lower for the play-of-color. Relying on their colours, opals may be paired with each silver and yellow gold.
With regards to tourmalines, it’s all concerning the depth of the colour. Pink and pink tourmalines, in addition to Paraiba tourmalines, are the most well-liked decisions for jewellery. Paraiba tourmalines often have a customized lower, as a consequence of their coloration sample and excessive worth. Widespread cuts for tourmalines embody pear, oval, and sensible cuts. They can be common into lengthy rectangles. As a result of its range, tourmalines may be worn as rings, necklaces, pendants, brooches, earrings, and bracelets.
Worth and Worth of Opal and Tourmaline
There are lots of components that may decide the worth of these October birthstones. Excessive-quality valuable opals can typically be costlier than emeralds, sapphires, rubies, and even diamonds. An opal’s high quality is determined by three chief points: coloration, sample, and readability. It goes with out saying that opals which have the play-of-color phenomenon are extra priceless than frequent ones.
White opals’ value usually varies from $20 to $200, whereas black opals can price from $30 to $1,500 per carat. Black opals which have extra carat weight, starting from 5 to 10 carats, can price as a lot as $50,000. Equally, hearth opals have a worth of $50 to $10,000 per carat.
Tourmalines are extra inexpensive than opals. For the standard tourmaline that has a usually good high quality, one carat can price from $50 to $750, relying on the colour depth and readability. Rubellites, then again, command the next value, between $400 to $1,000 per carat. Paraiba tourmalines are essentially the most priceless, and so they can price round $5,000 per carat.
As with all coloured gem stones, the extra saturated its coloration, the extra priceless the tourmaline is. One other issue that contributes to the worth of tourmalines is the dimensions. Paraiba tourmalines hardly ever come in additional than 2 carats, so naturally bigger stones price extra.
What Are the Most Costly Forms of Opal and Tourmalines?
Though opals may be present in a wide range of colours, essentially the most priceless forms of opals are black opals, particularly Australian black opals. They have a tendency to have a black physique coloration and lighter hues which can be refracted towards the gentle. As a result of their rarity and their intense darkish hues, they will price from $10,000 to $50,000 per carat. Another excuse why they’re so pricy is that they’re extremely difficult to dig out.
The costliest forms of tourmalines are the Paraiba tourmalines, which come from Brazil. They seem in blue, turquoise, and inexperienced colours. Although they have an inclination to include plentiful inclusions, they’re essentially the most priceless and likewise the rarest. Paraiba tourmalines with saturated, vivid colours can price from $2,000 to $5,000 per carat.
Equally, coloured tourmalines from Mozambique and Nigeria are additionally typically known as Paraiba tourmalines because it’s so exhausting to inform them aside. That’s why you need to all the time ask for a certificates distributed by a gemological laboratory.
When searching for the right opal, there are some things it’s worthwhile to take into account. Should you’re available in the market for a valuable opal, then you possibly can anticipate the extravagant play-of-color. One opal can have 5 or 6 colours directly, and so they change when you have a look at the opal from a distinct angle. Should you’re searching for a single-colored gemstone with no secondary hues, then this won’t be the precise alternative for you. Each opal is exclusive, and it may make a terrific substitute for a diamond engagement ring.
The standard of an opal primarily is determined by three components: the opal’s coloration, sample, and readability. To totally consider an opal stone, it’s worthwhile to have a look at its coloration depth and the standard of the play-of-colors. To do that, it’s greatest to put it towards a light-weight or darkish background, relying on the opal’s coloration. Both method, you’re going to wish to make a pointy coloration distinction.
Have a look at the opal’s transparency and readability, and whether or not it’s opaque or not. As soon as once more, this is determined by the colour. White and crystal opals must be clear to some extent or totally clear. Alternatively, black opals are extra valued once they’re opaque.
If you wish to purchase any form of gemstone, particularly for an engagement ring, it’s necessary to ask for a certificates to show its authenticity. The certificates ought to come from a good gemological establishment. This is usually a GIA, AGTA, AGL, or SSEF certificates.
Buying Ideas for the October Tourmaline Birthstone
There are lots of components it’s worthwhile to take into consideration while you’re searching for a tourmaline. Its value will primarily rely on the colour, readability, and dimension of the tourmaline. The costliest tourmalines are purple, pink, blue, and inexperienced tourmalines. Whereas black tourmalines are the most typical, they’re additionally the least priceless. The explanation for it’s because they will take up gentle, making them appear totally opaque.
Tourmalines are inexpensive than some well-liked valuable stones, and they are often nice replacements for emeralds, rubies, sapphires, and even coloured diamonds. Since tourmalines are made in hydrothermal environments, it’s regular for the liquid to be trapped of their minute inclusions. Relying on their coloration, they are going to simply be part of with a wide range of settings, equivalent to silver, platinum, yellow gold, white gold, and rose gold.
If you wish to get a Paraiba tourmaline, don’t neglect to ask for an authenticity certificates from a gemological institute. These kinds of certificates show the origin of the tourmaline, whether or not it has enhancements or remedies, and if it’s even actual or artificial.
Cleansing Opal and Tourmaline Jewellery
Opals are amongst probably the most delicate gem stones. Deal with them with excessive care. They’re delicate to daylight and modifications in temperature.
Since they’re very simple to fracture, it’s greatest to take away them from precarious conditions. If you wish to wash them, use lukewarm water and a really small quantity of cleaning soap. Don’t expose them to any chemical compounds and ultrasonic cleaners. If their floor scratches, they may lose quite a lot of their play-of-color.
As for tourmalines, they’re a lot stronger and sturdy than opals. Whereas they’re more durable to scratch or chip, they appeal to quite a lot of mud as a consequence of their electrical conductivity. Although this implies you’ll have to wash them extra typically, all you want is heat water and cleaning soap. Identical to for opals, don’t use ultrasonic or steam units to wash your tourmaline. Should you expose your tourmaline to a sudden change in temperature, this could considerably injury it.
Birthstone Fashion Quiz
What each birthstones have in frequent is that they will show virtually any coloration on the market. Whether or not it’s one intense hue or a kaleidoscope of colours, opals and tourmalines are distinctive and breathtaking gem stones that may enrich any jewellery assortment.
Do you may have any questions on October birthstones? Do you wish to store for opal and tourmaline jewellery? Be at liberty to contact our jewellery consultants.