Weight, Carat and Size is important to know when buying and selling gemstones. It is hard buying gemstones with out seeing it, Often the larger the stone the more valuable it is, not the case. You have to take in the colour, clarity, and inclusions (flaws). Picking up a gemstone, look at it under a light or loupe, If you can see right through it , is a good sign it is a great gemstones. Check the size dimensions in millimetres when you are buying gemstone and don’t rely on carat weight alone.
My first gemstone I bought was a green diamond it was .01 carat stone, 01 Carat stone is the size is smaller than a grain of fine sand. The gemstone was a green diamond, cost $10 Australian Dollars, if you look at it under a loupe you can see about 18 faceted cut in the stone. The $10 was a great investment as it is a real eye opener .I don’t know if it was a real diamond, at a guest no.
Colours – Agate come in lot of different beautiful colours. Blue, green, red, yellow, orange, browns, purples, whites so on.
Agate is found in lots of different place around the world. Australia, North West Queensland there, is several places to go different colors, 5 minutes from where I am no you can get Gooseberry Agates.
Around the world, some of the places you can get agate are. Austria, China, India, Brazil, Mexico, California, Botswana, Madagascar
Agate is a form of chalcedony quartz that forms in concentric layers in a remarkable variety of colors and textures. Agate was highly valued as a talisman or amulet in ancient times. It was said to quench thirst and protect from fevers. Collecting agate bowls became common among European royalty during the Renaissance and many museums in Europe, including the Louvre, have spectacular examples..
Agate is a form of chalcedony quartz that forms in concentric layers in a remarkable variety of colors and textures. Agate was highly valued as a talisman or amulet in ancient times. Geodes are rock cavities or vugs with internal crystal formations or concentric banding. Cut in slices, agate geodes are popular with collectors and jewellery designers.
Amazonite.Hardness is 6-65 Classification-Silicate
Color – The Color is green.
Found in – USA, Russia, Canada, Brazil, India, Mozambique, Namibia, Austria, Zimbabwe, Namibia and Australia.
I have never found Amazonite, I have watched the prospectors show on TV, finding Amazonite all the time. Here in Australia you can find it around Broken Hill in New South Wales.
Amazonite is a gemstone variety of green microcline, a feldspar mineral. It is named after the Amazon river in Brazil, though surprisingly no deposits have been found in that location. The lively green or blue-green colour is extremely attractive. Amazonite, cut en cabochon, with a rounded and convex polished surface, is a classic stone to be set in silver or carved in imaginative forms. In fact a fine quality amazonite can be mistaken for precious jade. Amazonite does not undergo any kind of treatment. Amazonite is gaining popularity but is still an affordable fine gem for its carat weight.
Amazonite is said to calm one’s emotions and soothe nerves, and to enhance creativity and the ability to express oneself. Perhaps the strongest recommendation for its metaphysical power is that Amazonite is said to makes your married life happier.
Amblygonite color- White/Greyish, Light yellow, pink or lilac, Greenish.
Country found Sweden, France, Australia, Brazil, USA.
Amethyst. Hardness–7 Classification– Silicate.
Amethyst come in a lot of different colour purples.
Amethyst is found in a lot of different places around the world. Some of the largest is from Russia, Namibia, South Africa, Brazil, Canada, USA, Australia.
Ametrine. Hardness–6 Classification– Silicate.
Ametrine –Colours are Purple to Yellow.
Found in Bolivia.
Quartz which occurs in bands of yellow and purple has been given the name of ametrine (amethyst + citrine).
Initially cutters favored windowed emerald shapes with a 50/50 split of colors, and much of the rough is still cut this way. More recently, however, some cutters have begun to cut a variety of shapes, many of which create internal reflections that blend the yellow and purple into attractive shades of rosy gold and mauve, or create mosaic-like flashes of both yellow and purple.
Found in Ireland, Russia, USA, Mexico, Brazil, Afghanistant, Pakistan, India, Zimbabwe, Australia.
Aquamarine is best known for its breathtaking range of blue colors and belongs to the same family as emerald (beryl). The name derives from the Latin expression for seawater. Aquamarine is colored by trace amounts of iron that find their way into the crystal structure. A dark blue is the most desired color. Aquamarine possesses a durable hardness (7.5-8 on Mohs scale), which qualifies it for any kind of jewelry.
The favored cuts are emerald (step) and brilliant cut with long or rectangular shapes. Turbid stones get a cabochon cut.
Aquamarine is a decorative gem that complements almost any skin or eye color, which makes it an all-time favorite for women the world over. It is a popular gem, universal to wear, readily available and moderately priced, but growing in popularity.
Found. Spain, Russia, Namibia, Madagascar, Pakistan, Colombia, Brazil, USA, Australia.
Beryl in its purest form is completely colourless (goshenite). Trace impurities and colouring agents are responsible for the many different colors found in gemstone varieties of beryl. Beryl is one of the most important mineral groups and also one of the biggest gemstone groups. Although the mineral is abundant, it rarely occurs in transparent gem-quality material. Transparent gem-quality beryl is referred to as ‘precious beryl’. The most famous beryl gemstone is green emerald, followed by blue aquamarine. Golden beryl is not very well-known by the general public. Other popular beryl gems include pink ‘morganite’ and white, or colourless, ‘goshenite’. Red beryl is the rarest variety of beryl and it is known in the trade as ‘bixbite’.
Bloodstone. Hardness 7. Classification Silicate.
Colour. Dark Green/Grey, Flecked Red.
Found. India, USA, Australia.
Bloodstone, also known as heliotrope, is a green gemstone dotted with bright red spots of iron oxide. A form of chalcedony quartz, the name heliotrope comes from the fact that polished stones were once thought to reflect the sun. Bloodstone is the original Birthstone for March. In the Middle Ages the red spots were thought to be the blood of Jesus and the stone was believed to have miraculous powers.
Boji Stone. Hardness 7.4 Classification Mineraloid
Chrysocolla is a hydrous copper silicate with that is found in several places in the world, including Russia, Nevada in the USA, the Congo, Chile, Israel and Mexico. Often confused with turquoise, chrysocolla is often found in unusual multi colour combinations as well as in blue or green.
Found. Spain, Russia, France, Madagascar, Brazil, Australia.
Citrine is one of the most affordable yet durable gemstones. Named from the French name for lemon,”citron,” many citrines have a juicy lemon color. Citrine includes yellow to gold to orange-brown shades of transparent quartz. Although the darker, orange colours of citrine, sometimes called Madeira citrine after the colour of the wine, has generally been the most valued colour, in modern times, many people prefer the bright lemony shades which mix better with pastel colours. Citrine is generally more inexpensive than amethyst and is also available in a wide range of calibrated sizes and shapes, including very large sizes.
Danburite. Hardness 7. Classification Silicate.
Colour. Colourless, White, Rose, Yellow, Lilac.
Found. USA, Russia, Japan, Mexico, Myanmar.
Diamond. Hardness 10. Classification Element.
Colours. Colourless, Sometimes Tinged with Yellow, Blue, Brown or Pink.
Found. South Africa, Russia, Brazil, Australia, USA.
Emerald. Hardness 7.5-8 classification Silicate.
Found. Colombia, Egypt, India, Zimbabwe, Pakistan, Brazil, Madagascar, Russia.
Fluorite. Hardness 4. Classification Salt
Colour. Wide variety, from clear to Black, via Purple, Blue, Green, Yellow, Pink, White, Brown.
Found. England, Germany, Italy, Switzerland, Russia, India, USA, Mexico.
Found. Brazil, USA, Sri Lanka, Madagascar, Australia.
Hardness 6.5-7 Classification Silicate.
Found. Russia, China, Burma, Japan, USA, Central America, New Zealand.
What was traditionally called jade is in fact two separate and distinct minerals: jadeite and nephrite. The term ‘jade’ can also be loosely applied to materials that contain jadeite or nephrite, such as maw-sit-sit and other materials. Jade has been treasured for centuries by cultures around the world, including the Mesoamericans and the Chinese, who consider it to be an auspicious gem. Choose jade gems from various shapes, sizes and colors, including green jade and lavender jadeite.
Hardness 7 Classification Silicate
Colours. Green, Red, Yellow, Brown, Blue, Purple, Black. and lots of different mixes of colours.
In its natural environment Jasper, a Form of Chalcedony, is dull stone, but once polished, it is a glistening, opaque crystal whose colour ranges from red, to brownish, yellow to green. It was widely used in the 16th century in Mosaic work.
Looking for gems, Gemhunting with other people is more interesting than going by your self. Plus it is much safer in groups. There is so many place to go between Mt Isa and Cloncurry, area.
All Year round Fossicking.
In the hotter months you do not do much fossicking because the rocks are even very hot, having a air conditioners in your cars, and having shade when you go fossicking make it a nice day out. You have to start out very early in the morning. Out here it is day light at 6am and it is still day light at 7pm at night, in the summer months.
When there is no rain.
Camping And Fossicking in cooler Months of the year.
I live in Mount Isa. North West Queensland. Only over the past 4 years have I been Interested in Fossicking for Gems- Stone. I am still a newbie. Lots more to learn. Fossicking is all year hobby. When there is rain, no way do you go on a dirt road, you are asking for trouble.
North West Queensland Fossicking Area’s.
You have to have a Fossicking Licence, before you can go Gem hunting in Queensland. If you are looking for gems-stones-rocks-gold, you have to have a licence,
Out here you can explore the country side, bush, if you have a 4 wheel drive and a good GPS. So easy to get lost.
Remember the land belongs to some one, so you could need permission to go on there land. Find out from the locals Lapidary Clubs. Or go to Government website to find out more..qld.gov.au
You are stupid if you go out exploring when it is wet. Raining.
We nearly got caught, 3 times in 2016 June, July and October. We packed up quick, we could see the rain coming. We were lucky we did not get stuck in the mud. The clean up took a week to do. Not much fun.
Weather. No Phone.
In the North West we do not get very good weather reports, our report is possible showers that never happen. over phone coverage is gone 5 minutes out of town. That is why you show have a good GPS. Ours has bird eye view, so you can see the country side ahead of you. It tracks you where you go, and when you get out of the car, you put it in your pocket. No chance of getting lost that way. If you have not got a GPS mark your trip, when you get out the car mark your track, use rocks.
Take your own water.
Take your own water, most of the creeks beds are dry. Water for drinking and washing your hands and stones.
Out of Date Books.
There is a lot of books out there that are out of date. Pictures Most Placers are not accessible in the wet. our country is red/black mud. even a 4 wheel drive can not handle it most of the time. Going on roads after flooding only wrecks the roads for everyone else. No one grades the roads we go on, if you check with your insurance company you will find even your car is not insured on these roads.
Want to go Fossicking. Not Sure where to go.
If you want to go fossicking and you are not sure where to go, Ask your Question, I might be able to answer you. Most people out here are very friendly. Best idea is to go into the tourist shop, in the town you are visiting, buy a sample of the stone you are looking for. ( Remember to support these shops they have to make a living).
Places you can go between Mount Isa and Cloncurry.
In the image above the prehnite is a cloudy green.
Prehnite Gemstone often appear Cloudy or velvety, and rarely fully Transparent.
The prehnite here was found in the N.T. Australia.
Picture below you can see the Cloudy green to yellow colour.
You can make nice Cabochon to make Jewellery, with this stone.
The most popular shapes include traditional oval, cushion and round shapes. Fancy shapes are not as popular, but can be found, including hearts, trillions and pears.
Prehnite may also be tumbled or beaded and it is a popular ornamental material used for decorative carvings.
When polished, prehnite has a vitreous to pearly luster. Prehnite may be confused with Apatite, Jade or Serpentine.
Prehnite .It was discovered in 1788 in the Karoo Dolerites of Cradock, South Africa.Prehnite was later named after its discoverer, Colonel Hendrik Von Prehnite (1733-1785). he was a Dutch Mineralogist and an early governor of the Cape of Good Hope colony.
Prehnite was the first mineral to be named after an individual, and it was also the first mineral to be described from South Africa, long before South Africa became one of the most important sources for precious and semi Precious gemstone. .
Until recently, Prehnite was a rare collector’s gemstone, but new deposits have now made it more readily available. In China, prehnite is sometimes referred to as ‘grape jade’ owing to nodular formations which often resemble a bunch of grapes. Its colour is usually a soft apple green which is quite unique to prehnite, but it can also occur in rarer colours including yellow, orange and blue.
Mohs Scale. Prehnite is considerably hard with a rating of 6 to 6.5 on the Mohs scale.
Prehnite; Origin and Sources
Prehnite occurs in the veins and cavities of mafic volcanic rock. It is a typical product of low-grade metamorphism. Primary deposits of prehnite are sourced from several locations around the world. Some of the most important deposits come from Africa (Namibia, South Africa), Australia (Western Australia, Northern Territory), Canada, China, Germany, Scotland, France and the United States (New Jersey, Pennsylvania and Virginia).
Rare, orange colored prehnite has been discovered in South Africa. Quebec, Canada is known to produce prehnite with distinct, individual crystals.
Buying Prehnite and Determining Prehnite Value
Prehnite occurs in a range of green colors, including pale green to dark green and yellow- to brown-green. Prehnite may also occur gray, blue, orange, white and colorless. A soft apple green color is most desirable, while blue, pink, colorless, white and orange are considered the rarest occurrences and are highly sought after by mineral collectors.
Prehnite: Related or Similar Gemstones
There are no closely related gemstones, but there are several gemstones which can have a very similar appearance (colour and lustre ), including jade, apatite, serpentine, brazilianite, peridot and more.