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Tektites on display case in sales room

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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

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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.

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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 © Ulrike und Franz Linzner
 
 
 
 

Tektites on display case in sales room

Copyright © Ulrike und Franz Linzner  - This image is copyrighted. Unauthorized reproduction prohibited.

Tektites on glass display case in sales room.
For discussion see https://www.mindat.org/mesg-106-466523.html

This photo has been shown 389 times
Photo added:10th Feb 2016
Dimensions:4000x2664px (10.66 megapixels)
Camera:CANON PowerShot SX280 HS

Data Identifiers

Mindat Photo ID:731156 📋 (quote this with any query about this photo)
Long-form Identifier:mindat:1:4:731156:4 📋
GUID:ede2c3ff-321c-48e2-926e-0429ef08b5ee 📋

Discuss this Photo

PhotosPumpung Lukaas mine, Cempaka diamond fields, Riam Kanan, South Kalimantan Province, Kalimantan, Indonesia

4th Jul 2019 09:07 UTCUwe Kolitsch Manager

Jason Utas suggested that these are tectites (indochinites).

I thought it would be pieces of the limonite-rich, water-worn gravel hosting the diamonds (note: photo wasn't made by me).


Any opinions?

4th Jul 2019 10:06 UTCJolyon Ralph Founder

Look more like tectites than limonite to me. I wonder if the title is incorrect and these are just tectites offered for sale

4th Jul 2019 11:53 UTCKeith Compton 🌟 Manager

An article: van Leeuwan, T.M. (2014) The enigmatic Sundaland diamonds. Proceedings of Sundaland Resources 2014 MGEI Annual Convention Conference Paper, discusses the diamonds from Cempaka.


One paragraph states: "The Kalimantan diamonds are commonly found together with a mineral suite that includes corundum, diaspore, zircon, chromite/spinel, pleonaste, rutile, and rare tektite (Ubaghs, 1941)"


The Ubaghs reference is: Ubaghs, J.C.H. 1941. Diamonds in Borneo. Report held in Perpustakan Direktorat Geologi, No F 41-2 (Translated from Dutch).


So perhaps they are tektites


Cheers

4th Jul 2019 14:43 UTCUwe Kolitsch Manager

Thanks, Keith - very interesting.

5th Jul 2019 07:07 UTCUwe Kolitsch Manager

My colleague and meteorite/tectite specialist, Ludovic Ferrière, thinks the two on the right side are tectites, but he is not sure about the piece on the left.

12th Jul 2019 00:25 UTCJason Utas

The specimen on the left is also a tektite. The large ~flat face with the single pit in it is an old break that exposed a bubble and has since been partly re-etched by groundwater. Faint flow-banding / schlieren are visible on the left side of the flat surface.


I looked around on Google for a similar tektite; this piece of Darwin glass is somewhat similar, although Darwin glass is generally much more vesicular than indochinites, excluding the Muong Nong layered tektites...

12th Jul 2019 11:21 UTCUwe Kolitsch Manager

Ok, caption fixed.
 
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