Gonnardite : (Na,Ca)2(Si,Al)5O10·3H2O, Hielscherite-Thaumasite series

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

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

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

Copyright © Yannick Verbelen 2013
minID: 4YU-EM1

Gonnardite : (Na,Ca)2(Si,Al)5O10·3H2O, Hielscherite-Thaumasite series

Copyright © Yannick Verbelen 2013  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 32 mm x 21 mm x 14 mm
Field of View: 28 mm

Thumbnail Graulay specimen. The white globular aggregates with radial structure are Gonnardite (with credits to Günter Frenz for visual determination). White aggregate in the upper right corner is Hielscherite-Thaumasite series.

This photo has been shown 594 times
Photo added:25th Nov 2013
Dimensions:1678x1100px (1.85 megapixels)
Date/Time of Photo:25th Nov 2013 18:03:01
Camera:CANON EOS 100D / Rebel SL1 / Kiss X7
Software:Paint.NET v3.5.11
Exposure time:1/200s
Focal Length:55mm
ISO speed:400

Other Views - click to switch

View Yannick Verbelen's Photos View Gonnardite Gallery

Discuss this Photo

PhotosHielscherite - Graulay, Hillesheim, Eifel, Rhineland-Palatinate, Germany

8th May 2016 19:20 BSTGünter Frenz Expert


the label "Hielscherite" on this picture is misleading. The main mineral on this picture is Gonnardite (white globular aggregates with radial structure when broken). In the upper right corner is another white aggregat, that could be the one on the label but should be named "Thaumasite-Hielscherite-series" as long as there is no analysis.

The associated detail-picture is even more misleading as the Thaumasite-Hielscherite aggregate is in the upper left corner way out of focus. On this picture also Phillipsite or maybe Flörkeite is visible, which is a common association for this locality.



8th May 2016 19:41 BSTUwe Kolitsch Manager

Message sent.

17th Jun 2016 20:11 BSTGünter Frenz Expert


did you get any reaction after about 6 weeks?



18th Jun 2016 22:04 BSTUwe Kolitsch Manager

No. Have now sent a normal email in case the PM landed in a spam folder.

11th Aug 2016 13:03 BSTYannick Verbelen

Hi Günter, Uwe,

Thank you for the visual identification of the misidentified minerals in the pictures, I have corrected the mineral descriptions as per your recommendation, with proper credit of course. Both the specimen view and detail picture have been updated.

My apologies for the (very) late response, I have gone through personal difficulties in the past months which have prevented me from spending any time on the hobby.

Best regards,

矿物 and/or 产地  
版权所有© mindat.org1993年至2020年,除了规定的地方。 Mindat.org全赖于全球数千个以上成员和支持者们的参与。
隐私政策 - 条款和条款细则 - 联络我们 Current server date and time: 2020.8.9 00:42:35