1/2
?

Corundum : Al2O3
Corundum Crystal locality, May Downs Station, City of Mount Isa, Queensland, Australia

How to use the mindat.org media viewer

Click/touch this help panel to close it.

Welcome to the mindat.org media viewer. Here is a quick guide to some of the options available to you. Different controls are available depending on the type of media being shown (photo, video, animation, 3d image)

Controls - all media types

Zoom in and out of media using your mousewheel or with a two-finger 'resize' action on a touch device.

Use the mouse or your finger to drag the image or the view area of the image around the screen.

< and > at the left and right hand side of the screen move forwards and backwards for the other images associated with the media you selected. Usually this is used for previous/next photo in a gallery, in an article or in search results. Keyboard shortcuts: use shift + the left and right arrow keys.

< and > in the bottom center are used for switching between the photos of the same specimen. Keyboard shortcuts: use the left and right arrow keys.

>  in the bottom center, raises the information box giving details and further options for the media,  <  at the top of this box then hides it. Keyboard shortcuts: use the up and down arrow keys.

? opens this help window. Keyboard shortcuts: use the H key or the ? key.

Other keyboard shortcuts:

1Fit image to screen
2Fill screen with image
5Display at full resolution
<Make background darker
>Make background lighter
spaceHide/dim titles and buttons

Scalebar

If the field of view (FOV) is specified for the photo, the scalebar appears in the left bottom corner of the viewer. The scalebar is draggable and resizeable. Drag the right edge to resize it. Double click will reset the scalebar to it's default size and position. If the scalebar is in default position, double click will make it circular.

Controls - Video

Video files have a standard set of video controls: - Reset to start, - Skip back, - Play, - Pause, - Skip forwards. Keyboard shortcuts: You can stop/start video play with the P key.

Controls - Animation (Spin Rotation)

Animation (usually 360 degree spin rotations) have their own controls: - enable spin mode. Note that while images are loading this option will not be available but will be automatically activated when the animation has loaded. Once active you can spin the image/change the animation by moving your mouse or finger on the image left/right or by pressing the [ or ] keys.

The button switches to move mode so that you can use your mouse/fingers to move the image around the screen as with other media types.

The button, or the P key will start playing the animation directly, you can interrupt this by using the mouse or finger on the image to regain manual movement control.

Controls - 3D Stereoscopic images

If a stereoscopic 3D image is opened in the viewer, the 3D button appears in the bottom right corner giving access to "3D settings" menu. The 3D images can be viewed in several ways:
- without any special equipment using cross-eyed or parallel-eyed method
- with stereoscope
- with anaglyph glasses.
- on a suitable 3D TV or monitor (passive 3D system)

For details about 3D refer to: Mindat manuals: Mindat Media Viewer: 3D

To enable/disable 3D stereo display of a compatible stereo pair image press the 3 key. If the left/right images are reversed on your display (this often happens in full-screen mode) press the 4 key to reverse them.

Controls - photo comparison mode

If a photo with activated comparison mode is opened in the viewer, the button appears in the bottom right corner giving access to "Comparison mode settings" menu.

Several layouts are supported: slider and side by-side comparison with up to 6 photos shown synchronously on the screen. On each of the compared photos a view selector is placed, e.g.:  Longwave UV ▼. It shows the name of currently selected view and allows to select a view for each placeholder.

Summary of all keyboard shortcuts

1Fit image to screen
2Fill screen with image
3Switch to 3D display of stereo pair
4Switch left/right images in 3D mode
5Display at full resolution
<, >Make background darker/lighter
H or ?Show/hide this help page
PPlay/Pause Video or Animation
[, ]Backwards/forwards one frame (Animation only)
spaceHide/dim titles and buttons
up arrowShow information box
down arrowHide information box
left arrowPrevious child photo
right arrowNext child photo
shift + left arrowPrevious image on the page
shift + right arrowNext image on the page


 
 
 
 
 
minID: V97-05J

Corundum : Al2O3

This image is copyrighted. Unauthorized reproduction prohibited.
Locality: ⓘ Corundum Crystal locality, May Downs Station, City of Mount Isa, Queensland, Australia
Dimensions: 38 mm x 27 mm x 34 mm

Measures 38 x 27 x 34mm

This nice Corundum crystal cluster was self collected by Sharon Clifford and Ken Stockdale of aussieminerals.com in February 2009.

This photo has been shown 881 times
Photo added:9th Jun 2010
Dimensions:639x482px (0.31 megapixels)
Camera:KODAK DX7630 ZOOM

Data Identifiers

Mindat Photo ID:313746 📋 (quote this with any query about this photo)
Long-form Identifier:mindat:1:4:313746:5 📋
GUID:31eb600c-4ec6-4b64-a815-64e1d8f0b5d1 📋
Specimen MinIDV97-05J (note: this is not unique to this photo, it is unique to the specimen)

Other Views - click to switch

Discuss this Photo

PhotosCorundum - Mt Isa - Cloncurry area, Queensland, Australia

11th Jun 2010 00:13 UTCSharon Clifford

It has been queried by Van King of Mindat that this specimen of Sharon Clifford's may not be from Mount Isa. There are many minerals in this area that Mindat are probably unaware of, that doesn't mean they don't exist. There are other members of Mindat that have lived in this area and are well aware of the Corundum here and I invite them to contribute to this thread.

I will be giving Sharon many minerals in the future to place pictures of on Mindat, some of them will not be known to Mindat as coming from this area, but rest assured, they did.

I, Ken Stockdale, from Aussieminerals.com, as well as many other Australians in this area have collected these specimens from a secret location near Mount Isa. I have known of these for many years, having read about them in a book, and have only recently found the location.

The very reason this place is kept secret is out of respect for the landowner who does not want a stampede of people.

A friend of mine was also given a large specimen from a local collector. Another well known collector in Mount Isa had been throwing them at the neighbours barking dog for several years, so he was obviously collecting them as well.


Message is written by Ken Stockdale using Sharon Cliffords user ID with her permission as the PC auto logged onto it.

11th Jun 2010 02:12 UTCCostas Constantinides

Yes there is corundum in the Mount Isa region...As you see by the attached image..Very few found were the barrel shape,most looked like a large brain ,the largest I ever saw was about 8inches diameter..No one knows where they originated as they are stream worn and found in a small creek near Mount Isa.Con

11th Jun 2010 03:08 UTCKen Stockdale

Thanks Con. You were quicker than I thought.:)-D

I am getting a bit tired of unqualified comments from people who don't live here about where a stone may originate.

It is no wonder Australian minerals find it hard to be popular in the World.

Ken

11th Jun 2010 04:10 UTCDennis Tryon

Looks just like the quartz with lazulite I have from Graves Mountain, Georgia.


Dennis

11th Jun 2010 04:38 UTCKen Stockdale

Thankyou Dennis but SG blows that theory out of the water. Thanks anyway. I can assure all, it is Corundum. That was never the question.

The problem is a person who should know better has accused Sharon of listing a picture that is of a mineral that Mindat doesn't have listed so it can't be from here. I dug it myself.

I have posted a picture here of one very similar to the ones Con spoke of above.


Ken

11th Jun 2010 05:13 UTCGreg Dainty

I would just like to confirm Con and Kens information. Con, very nice crystal, the best I seen from that location.

I also have a number of corundum specimens, from Mt Isa district. Some similar to Cons pics, and others from a different location, in the Mt Isa area, these I got directly from the person who mined them, so there is no doubt about their provinance. There are also the margarite after corundum, from May Downs, Mt Isa . I am sure there are quiet a few more corundum sources in this rich mineral district. ........Greg

11th Jun 2010 06:40 UTCKen Stockdale

Thank you Greg,

See, even us locals don't know everything about our area. That's very interesting and a valued contribution.

Ken

17th Jun 2010 15:37 UTCRalph S Bottrill 🌟 Manager

Hi Con

could we upload your neat corundum picture to Mindat please?

18th Jun 2010 06:57 UTCCostas Constantinides

Hello Ralph,,

You can upload the picture..

Cheers Con

19th Jun 2010 02:11 UTCRalph S Bottrill 🌟 Manager

Thanks Con, what size are these ones?

19th Jun 2010 06:19 UTCCostas Constantinides

Hi Ralph,,The ballel shaped is 95mm long x 15mm at the thickest part,,,The other is 55mm X 20 mm..

The core of the barrell shaped corundum is dark blue with a grey coating of corundum..When seen in hand the faces are easily seen..

They come from a small cattle station north of the Isa..Most are found in a small creek and a few are found these days as a the locals got stuck into them a years ago.A couple are found after a good flood (when we get the rain)There is none that I have seen in any matrix..I would guess that they came out of the parent rock eons ago ,and being as hard and as tough as they are survived the tumbling and grinding and wearing down of the country..I dont know if they seem out of place,, but they are there..Con

19th Jun 2010 08:58 UTCRalph S Bottrill 🌟 Manager

Thanks Con

so what is the best location to put in for these?

20th Jun 2010 08:36 UTCCostas Constantinides

Hi Ralph,,the same locality that was used for the original input,,,May Downs Station ,,Mount Isa,,,(The station abuts Mount Isa,so you couldn't get any closer.

As you know this North West Mineral Province here in NWQueensland is huge with small towns and a population of only 50/60 thousand people..The worst part is that the shire boundaries are ridiculous and mosty defined by history and not common sense..For instance the Cloncurry shire boundary is only about 30k south of Mount isa but by road is more than 130k from Cloncurry..Our western boundary goes as far the border 200k away..So you see to put a location to minerals that are not found in a mine is always a problem..I tend to use1 near a town or2 area near a town 3 or on a cattle property (the owners are not fond of this)4 or a small mine ,but these sometimes have a name change...etc etc Con

20th Jun 2010 12:21 UTCRalph S Bottrill 🌟 Manager

Hi Con

I thought I should check as a previous post said it was north of Mt Isa and my recollection is May Downs was to the south.

There are certainly high grade metamorphic rocks in the area so its occurrence is not unexpected. People found similar nodules near Broken Hill but would not reveal the location.


I agree with your thoughts on Shires and your location methods for such isolated areas; there is usually little alternative unless you have an officially named hill or creek, etc. Or someone gets busy with a GPS.


Thanks again.

21st Jun 2010 00:09 UTCKen Stockdale

May Downs Station is to the West directly of Mount Isa and the location was given to Mindat as North, North West for the Corundum. The obvious conclussion in accordance with mapping is that the property covers a large area to the West and North West of the town to the South/West. The exact location of these Corundums will not be given by Sharon or myself.

There has been numerous questions aked by Mindat of the exact location of these.

I look at many listings on Mindat that simply say "Queensland, Australia".

Why do other locations get such a hard time trying to put up a picture for all to see?

You need a copy of Terrance Alick's book of Pastoral Stationsso you can see where a property really is in Queensland and not where you believe it is.

The Corundum has been relisted to "Corundum crystal locality, May Downs Station, Mount Isa District, Mount Isa - Cloncurry area, Queensland, Australia."

Who knows what Cloncurry has to do with May Downs Station when May Downs is clearly on the West Side of Mount Isa and Cloncurry is 120 Km to the East side of Mount Isa.

Mindat is making a mockery of Nomenclature on this site.

If it is not in the Cloncurry area, then change it.

In the Scientific World, Nomenclature is a very important part of of any item preserved or maintained. To keep using incorrect names because it is too difficult to change them all, is sheer arrogance and extremely unprofessional.

21st Jun 2010 00:39 UTCKen Stockdale

By the way.

The Mount Isa and Cloncurry Shires are definite and well defined like any other in this Country.

It's the continual incorrrect use of them or make believe ones that is the problem.

21st Jun 2010 01:52 UTCDon Saathoff Expert

Ken, I'm not a volunteer on Mindat....merely a concerned user. One thing many people seem to forget is that the administrators MUST depend upon US to take care of problems. This is OUR database, Jolyon merely (no slight intended) started it and owns it but cannot possibly know all details about all locations...that's OUR job as users.


As for arrogant & unprofessional.....well.....I would consider your rant to fall into both catagories.


And, as far as provenance is concerned, how professional is your secrecy concerning the site??


Don S.

21st Jun 2010 02:43 UTCKen Stockdale

It is very professional to respect the occupier of the land.

As for us providing information accurately.

The lister of the Corundum was told by Mindat that because it was 10 Km North West of Mount Isa, it could not be from Mount Isa. So unless you are familiar with property or locality boudaries here. BUTT OUT.

21st Jun 2010 04:07 UTCKen Stockdale

A qualified description from me of the origin of the Mount Isa Corundums.

The above posters have never found them but have purchased or been given them.

The source is from a Green Mica Schist, Origin of which is still secret.

The very reason each and every sample has Mica still attached. (Obvious I would think that they have not travelled far or for very long).

The fact they are shedding in a waterworn state with the Mica still attached is a Geological mystery.

So the theory that they may of been shedding Eons ago may be correct, before they became in Situ in their present location.

Note the Mica on the specimens above.

21st Jun 2010 14:28 UTCRalph S Bottrill 🌟 Manager

Ken

Did a snake just bite your @#$%? - you need to settle down a bit before someone takes offence. We work on this site to help others not as a professional occupation, usually late at night and dont have time to run about looking up books on pastoral stations etc. If you have better information on locations, as you obviously do, please help us get it right not just abuse us.

I reiterate that I side with Con on the Shire designation as generally being of little use to average users. In Tasmania, one goes from eastern Tasmania to western Tasmania - about 250 km and useless as a location description - similar to Mt Isa area. Geologically and geographically, Mt Isa and Cloncurry are usually lumped together as a broad district, with sub-districts around the main towns etc. But if you wish to look at restructuring all the Queensland locations give us your proposal and we may let you go for it if you can spare some time.

Re photos just located as "Queensland" etc please send in complaints on such and we will see if we can fix them, but we cannot catch all photos submitted for the above-mentioned reasons. Also we are very poorly covered for photos in much of Qld, please can you see if you can add some (eg no sapphires shown!!). Help always works better than abuse in fixing things.
 
and/or  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: May 9, 2024 23:02:21