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Zoisite (Var: Tanzanite) : (CaCa)(AlAlAl)O[Si2O7][SiO4](OH), Prehnite : Ca2Al2Si3O10(OH)2, Graphite : C, Calcite : CaCO3

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


Copyright © Rob Lavinsky & irocks.com
 
 
 
 
 
 
minID: CPF-W6W

Zoisite (Var: Tanzanite) : (CaCa)(AlAlAl)O[Si2O7][SiO4](OH), Prehnite : Ca2Al2Si3O10(OH)2, Graphite : C, Calcite : CaCO3

Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 6.8 cm x 5.2 cm x 3.4 cm

6.8 x 5.2 x 3.4 cm. A stunning and unusual specimen featuring a 5 x 3 x 1 cm trichroic tanzanite crystal sitting starkly in matrix of calcite, green prehnite, and graphite. The crystal has a natural rich blue color, unheated by man to emphasize the blue saturation as they do in the gem trade. Note the red/violet color showing up the C axis, as the piece is lit from the bottom. Few matrix tanzanites have ever been recovered. Part of the reason is the geology, and part of the reason is that it was always easier for miners to chip the crystals out for the gem trade instead of to try to collect them as specimens with attached matrix for our world. Specimens like this were therefore always prized in the mineral world, because they display so nicely and show the environment in which the tanzanite forms. Even among matrix specimens, though, there were only 2 pockets that I know of with such amazing association as we see here, to the green prehnite. This came out in 2010. It has been in a private collection since that time. This special piece is complete 360 degrees, all around, and features a fully exposed tanzanite crystal sitting perfectly.


This photo has been shown 86 times
Photo added:12th Apr 2016
Dimensions:1036x1500px (1.55 megapixels)
Camera:CANON EOS 6D

Data Identifiers

Mindat Photo ID:741288 📋 (quote this with any query about this photo)
Long-form Identifier:mindat:1:4:741288:9 📋
GUID:0b540eea-558b-4c42-95d6-bffe0b428450 📋
Specimen MinIDCPF-W6W (note: this is not unique to this photo, it is unique to the specimen)

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