Washing ruby-laden gravel in the rich mines of Mogok, 1904.

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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 for further 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
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<Make background darker
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Controls - Video

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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

Stereoscopic 3D image viewing requires a suitable 3D television or monitor correctly configured for your computer. Passive 3D systems such as LG 3DTVs are the easiest to configure for this.

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.

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)
up arrowShow information box
down arrowHide information box
left arrowPrevious image/media page
right arrowNext image/media page
spaceHide/dim titles and buttons


Washing ruby-laden gravel in the rich mines of Mogok, 1904.

This image has been released to the public domain and may be used freely.

The explanatory text on the back of this stereo image is as follows:
“Ages ago there must have been an immense river flowing through this part of the country for the character of the ground shows, on examination, that it is the accumulated sediment of an ancient stream and this hillside must have been part of the bank.
For centuries the Burmese have resorted here to search for and dig out of the gravel of the old river bed the precious rubies with which it is extraordinarily enriched. The ruby mines in the valley about here are the finest known anywhere on earth. Single stones have been found worth $50,000 and though large “finds” are not made every day, it is said that more than $7,000 worth of these precious stones are found weekly.
Some of the gem-bearing gravel is sifted and sorted dry. Some of it, especially where it is mixed with earth, can best be handled by washing. This is the process that is going on here. Those baskets on the long, balanced poles are used to take up the washed gravel from the pit. The gravel is then sorted and prizes--often looking to inexperienced eyes like any common bits of stone—are seized, to be carried to the cutters and polishers.
The men at work here are Burmese. Since the annexation of Burma to the British Empire, the government has put the mines under the control of a London syndicate but the syndicate must, by the terms of the character, grant licenses to such natives as wish to engage in mining on their own account.”
Keystone View Company, copyrighted (1904), by Underwood & Underwood, Inc., image No. 3827.

G. Grundmann collection.

This Photo was Mindat.org Photo of the Day - 21st Mar 2017

This photo has been shown 557 times
Photo added:31st Jan 2017
Dimensions:5585x2796px (15.62 megapixels)
Date/Time of Photo:30th Jan 2017 23:03:26
Software:Windows Photo Editor 10.0.10011.16384

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