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Three main oxides of iron-Minerals.

The three main oxides of iron

Iron(III) oxide or ferric oxide is the inorganic compound with the formula Fe2O3.

Iron(II) oxide (FeO), which is rare,

Iron(II,III) oxide (Fe3O4), which also occurs naturally as the mineral magnetite.

As the mineral known as Hematite, Fe2O3 is the main source of iron for the steel industry.

Fe2O3 is ferromagnetic, dark red, and readily attacked by acids. Iron(III) oxide is often called rust, and to some extent this label is useful, because rust shares several properties and has a similar composition. To a chemist, rust is considered an ill-defined material, described as hydrated ferric oxide.[

Rust is an iron oxide, usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture.

Standard Tumble Polish for Rocks and Glass Aluminum Oxide (1 lb)

Polishing

A very fine powder of ferric oxide is known as “jeweller’s rouge”, “red rouge”, or simply rouge. It is used to put the final polish on metallic jewellery and lenses, and historically as a cosmetic. Rouge cuts more slowly than some modern polishes, such as cerium(IV) oxide, but is still used in optics fabrication and by jewellers for the superior finish it can produce. When polishing gold, the rouge slightly stains the gold, which contributes to the appearance of the finished piece.

Rouge is sold as a powder, paste, laced on polishing cloths, or solid bar (with a wax or grease binder). Other polishing compounds are also often called “rouge”, even when they do not contain iron oxide. Jewellers remove the residual rouge on jewellery by use of ultrasonic cleaning. Products sold as “stropping compound” are often applied to a leather strop to assist in getting a razor edge on knives, straight razors, or any other edged tool

More to Come

Leave me a comment and help me add to this story about oxides of iron-Minerals.

Have a great day.

Wendy

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Lead Rock-Lead Mineral.

Lead Rock-Lead Mineral.

What does a lead rock look like.  Images of a beautiful lead rock.

Out in the sun it looks like, it has millions of  shiny silver sparkles

Lead it a very soft material, cutting this big rock was a easy cut, using water.

There is other minerals that show up in this beautiful Lead Mineral Rock.

You can see native  copper  running through it.

This rock is beautiful, If is a very shiny rock.

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Image of a lead rock that I cut in half.

Lead rock

Lead rock cut in half.

This  lead rock has natural copper running through it. Has sparkles of the Peacock ore.
To touch and hole this beautiful rock, if is a beautiful Rock. The inside of the rock show other minerals, and is not as pretty as the out side.

When cutting this rock, Lead rock  was so soft the blade just went through it  with ease.. The rock it self is very heavy to pick up.  Lucky the rock is so shinny, as it would be impossible to polish it being so soft.

Sources: Of Lead

Lead exists in its native form, though it is rare. Lead may be obtained from Galena (PbS) by a roasting process. Other common lead minerals include Anglesite, Cerussite, and Minim.

More pictures of this beautiful Lead Rock/Mineral, I found.


 

 

I Hope you Enjoy these pictures.

I live in a mining town, where lead dust is. They have TV adds, about what you can do to avoid getting lead poisoning.

How bad is it.?.

Lead toxicity, also often referred to as lead poisoning

Have a great day.

Wendy.

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What are Macrocrystalline- Crypocrystalline Quartz

 

What are Macrocrystalline- Crypocrystalline Quartz

How are Macrocrystalline- and Cryptocrystalline Quartz Different?

How is Macrocrystalline Quartz different from the Cryptocrystalline Quartz ?

Macrocrystalline Quartz like Amethyst and Rose Quartz are generally transparent-translucent. Clear crystals are so beautiful.

Cryptocrystallines like agates are more often opaque. Agates and Cryptocrystallines can be slightly softer than Macrocrystallines, 6.5 on Moh’s scale rather than a full 7.

Cryptocrystallines have a duller, wax-like luster while Microcrystallines have a shiny, vitreous luster.

Cryptocrystallines have a higher water content as well as other non-quartz ingredients, up to 20% more.

Because the Cryptocrystalline Quartz can include several Non-Quartz minerals, many of these Quartz are considered Rocks.

Macrocrystalline Quartz– like.   Amethyst, Citrine, Tigereye, and Smoky Quartz, which are more likely called Gems, Gemstones or “stone due to their Purity, Bling, shine.

Cryptocrystalline Quartz  can look like a Coloured Rock or a dirty rock until it is broken, smashed or cut open.  Picking one up, the colours get your attention.  Check out Agate. Lots of beautiful colours.

These are my Agate From Agate Creek in Qld.

Small Different Colours Agate

Agate from agate creek Qld

Cut Agate Stone

Agates from agate creek in Qld

 

 

 

 

Agate come in lots of colours have a look at these agate pictures .  Are they Real?

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Garnet Gemstones

Finding  Garnet . Red-Pinkie- Purple Colour.

Fossicking for Garnet in the area in North West Queensland Australia , there is a lot of different places to find Garnets. Out side Cloncurry there is a hill where we go, and there is garnet everywhere , only trouble, they have all mostly got flaws in them. They do come out nice and shinny out of the tumbler. Mine you, you can find good ones, that can be faceted Garnets.

Check out the video below and find out about finding garnets at Fullarton River. Fullarton River turn off is on the Winton road.

Garnets come in all colours. In addition to these six species, there are a number of other garnet varieties that are distinguished in the gem trade, based on their colour or other special properties. Altogether there are at least 17 different varieties of garnet.

In real life I have see a green garnet that had that many fractures.  Also a red garnet until you put it in the light, it is more pinkie to purple. These Garnets are from Fullarton River outside Cloncurry. The area is a Qld Government fossicking area.

 

Garnet Colour

Garnet is available in a veritable plethora of colours, such as yellow, orange, peach, green, red, purple, blue (rare), brown and pink. However, the most commonly occurring colour is red and the rarest is blue. Garnet also rarely occurs in colour-change varieties, which have a different colour depending on whether they are viewed in incandescent or natural light. The rarest colour-change garnet appears blue in daylight, and changes to purplish-red under torch light. Other colour-change garnets are green, beige, brown or grey in daylight, and change to reddish or purplish-pink under incandescent light. The colour of garnet is the most important quality factor.

 

 

Identifying Garnets

Garnet can be identified by its occurrence in metamorphic rock, its hardness (6.5 – 7.5 on the Mohs scale), colour, refractive index and cubic crystal structure. However, the quickest way to identify garnet is with the use of strong neodymium magnets. Garnet is attracted to neodymium magnets because it contains high concentrations of iron and/or manganese.

Garnet Cut and Shape

Rhodolite Garnet
Rhodolite Garnet

Garnets are extremely versatile and can be cut in any fashion and shape. Red garnet tends to be cut into standard shapes, whereas valuable garnets that are not often found in large sizes, such as Tsavorite and Demantoid, are cut into shapes that retain the most carat weight.

gneiss

Garnet are very common.

Garnets have come in Many Colours.

 They also have many names: Almandine, Andradite, Demantoid, Grossularite, Hessonite, Pyrope, Rhodolite, Tsavorite, Spessartine, and Uvarovite, to quote but a few. But let us restrict ourselves to the most important and begin with the red garnets.  See the colour chart at the bottom of the page.

pear-tsavorite-garnet-gem
Green Tsavorite Garnet

 

Almandine Garnet
Almandine Garnet

Pyrope Garnet.

 Fiery red pyrope. Its spirited red, often with a slight brownish nuance, was a gemstone colour much in demand in the 18th and 19th centuries.

Pyrope is an individual member mineral of the Garnet group. Its dark, blood-red color is distinct and attractive, and makes a fine Garnet gemstone.

Almandine Garnet.

Almandine is perhaps the most common garnet. Gemstones always have some spessartine and pyrope components, and this creates a wide range of colours, including brown, red-brown, purplish red, wine red, purple, and deep red. Inclusions of asbestiform minerals (pyroxene or amphibole) create a chatoyancy that yields, in cabochons, a 4-rayed star.

Almandine Valuegar

It is also a popular gemstone and the most widely used Garnet in the gem trade. More gemstones are faceted from Almandine than any other type of Garnet. Only a small amount of Almandine crystals are transparent and light enough for gemstone use; most of the Almandine found is rough and opaque and not gem quality. Some Almandine Garnets display asterism ( star pattern) when polished as cabochons, and are known as “Star Garnets”.

garnet1
Mica Schists

Almandine is often embedded in a mica schists, and forms very nice matrix pieces with perfectly formed symmetrical crystals. The schist matrix often breaks up due to weathering, resulting in the Almandine crystals breaking loose into individual, perfectly formed floater crystals which may be quite large.

 

Almandine, an iron- rich Garnet, is a minerals often found in metamorphic rocks such as gneiss.

Metamorphic Minerals.

In Mountain-forming areas, heat and pressure change existing rocks, and new minerals grow. These metamorphic minerals usually have a good crystal shape. Some Minerals, such as garnet, form over hundreds of thousands of years as heat and pressure gradually alter the rock

The Garnet can grow as large, eye shaped grains called Augens

garnet-amphibolite
Garnet Gneiss: A coarse-grained gneiss composed mainly of hornblende (black), plagioclase (white), and garnet (red) from Norway. Public domain photo by Woudloper.

 

Gneiss is a foliated metamorphic rock that has a banded appearance and is made up of granular mineral grains. It typically contains abundant quartz or feldspar minerals.

 

 

 

 

Garnet colour Chart.

garnet2

 

 

 

 Looking for Garnet at Fullarton River outside Cloncurry north Qld.


I hope you have enjoyed this blog about garnets.

Have a nice day

Wendy. Please leave a comment.

Thank You.

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Start A Rock Collection.

Start a Rock Collection.

Giving a sample of rock specimens, can be a good start for a child interested in geology.( Rock Collecting).

They’re handy and everywhere, small, and not too expensive.

Books, maps, a good rock hammer, a magnifier, and the guidance of local experts will take your child much further.


 

Starting Collecting Rock/Stones.

Start your Rock Collection  , buying a pamphlet/book about rocks/gemstones and a few basic tools, is all you need to begin. Going on holidays in the car, stop and have a look around, on the side of the road, there is  lots of places where you can find all different types of  rocks  Yes you can buy them but you don’t know if they are real.



Are Your Rocks Real.

How do you  know if your rock is real or not.

Well if you go to a tourist shop and buy something packaged in a beautiful boxes or card, you can guest they are made by the millions, for shops. Don’t buy collections that are glued to a card—that discourages close examination of the rocks. Your rocks should still be dirty and have they own personality-look. Some rocks are the same size but one might be  heavy, than the other rock. This is where you get the interest in Rockhunting/Fossicking. Understanding and finding out Why the different.

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Lapidary Club.

Joining your local Rock (lapidary ) Club Is a good idea. They will help you out, where to find rocks. Most of the time the clubs have tag along tours, and they show you what to look for.

There is a lot of shop that have samples of rocks, never buy ones that are  clean and pretty/shiny. Buy dirty rocks and clean them up your self. use washing up detergent and a brush. to clean the dirt off. Again you local Lapidary club has the equipment to make your rock shine. Parents will most likely have to do all the work, because most clubs wont let children under 12 years use there machine.

Lapidary Equipment.

Another away is to buy your own equipment. To clean and polish small rocks is to use a tumbler. Tumblers are used to put a high polish on stones, they round of the corners, come out pretty shinny. Takes up to 6 weeks.

The best  way is to go to your local Lapidary Club and join, they have lots of equipment to use, and show you how to use the equipment and cut and polish your stone.

 

Use  a Dremel .


Dremel 4000-6/50 120-Volt Variable-Speed Rotary Tool with 50 Accessories


When I started out I used a Dremel to clean my rocks. I had to wear a mask because of the dust.My first stones I tried to polish was a opal, opal is mostly sandstone, so it was quite easy to shape a stone. With harder stone like a Amethyst, that are not clear, hit them with a hammer to make them smaller, then go and shape them. using a tumble to polish  these stones are much easier way.

Use Wet and Dry Sand Paper.

Using wet and dry sand paper to polish a stone. Have a flat piece of glass, put your sand paper on the glass, wet if and start rubbing, it does take a long time. ( Do it while watching TV.)

 

I will add more equipment later.

Have a great day.

Wendy.