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Talc : Mg3Si4O10(OH)2

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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


Copyright © Rob Lavinsky & irocks.com
 
 
 
 
 
minID: 8AL-65R

Talc : Mg3Si4O10(OH)2

Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 10.6 cm x 8.8 cm x 4.5 cm

10.6 x 8.8 x 4.5 cm. A very flashy, large, and aesthetic specimen with a great 3-dimensionality. Although talc is actually quite common and mined by the ton in some places, crystallized talc has historically been very, very rare. Here we have a surprise: A rare find, traded to us by a customer who self-collected these and spent months carefully dissolving the surrounding matrix away, these are quite remarkable specimens of crystallized talc with a pleasing green color. As they formed hosted in enclosing matrix, they have surreal shapes and forms from constrained growth, but are actually complete all around. This quarry is more famous for some brookite and anatase. It actually produced some pretty good specimens for Canada. Geologically this spot is very closely related to Vermont Verde Antique International quarry, which is just across the border and produced some historic talc specimens in the past. Although talc is prolific at this spot it occurs mostly as massive deposits or very fine grained white to grey masses. These large translucent green talc crystals came from a very small localized spot. Dr. Donald Doell Jr. collected them around 2008 and they sat in his basement for a while. They needed to be prepped carefully out of the dolomite vein that they formed in (by acid removal of the carbonate around them). As he tells me: "I was hoping I might be able to go and find some more, after discovering that they prepped out quite well. Sadly by then the quarry had been reclaimed and completely filled in. So what you got from me is the best I had and looks like there wont be any more."


This photo has been shown 169 times
Photo added:16th Nov 2015
Dimensions:1500x1090px (1.64 megapixels)
Camera:CANON EOS 6D

Data Identifiers

Mindat Photo ID:716934 📋 (quote this with any query about this photo)
Long-form Identifier:mindat:1:4:716934:9 📋
GUID:48e5c870-3972-4c60-92d0-ddebf33d4ace 📋
Specimen MinID8AL-65R (note: this is not unique to this photo, it is unique to the specimen)

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