AMETHYST CRYSTALS (LARGE NATURAL GEODE) - Brazil

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AMETHYST QUARTZ
A large natural geode

Rio Grand do Sul, Brazil

In Rio Grand do Sul, the southernmost state of Brazil, and in adjacent Uruguay, quarries produce amethyst crystals that occur lining large hollow ‘geodes’. These were formerly gas bubbles in 130 million year old basalt lava that now forms the giant Paraná lava plateau.

This is a beautiful piece but is large and very heavy. The back is an attractive natural green colour where it was in contact with the basalt rock. Some rock is still attached which makes this an educational piece. Also, many of the crystals on this specimen have beautiful tufts of golden, needle-like goethite crystals inside.

It is completely natural and exactly as found. Most of the amethyst geodes for sale nowadays have had the rear surface painted and they are often set in painted concrete so that they stand up for display.

Please note: This item weighs over 20 kilograms! Because it is large and heavy, we advise that you collect it from us at one of the shows or fairs we attend.

If you would like to purchase this item, or to see it on approval at one of the shows (no obligation) please email us or send us a message via the 'contact us' page.

Please note: The colour of amethyst has been known to gradually fade if exposed to bright light, and so exposure to direct sunlight is not recommended. However, If displayed in indirect, low-level lighting the colour will last a lifetime. See the following article for more information:
www.mindat.org/article.php/905/Amethyst+Specimens

Click on a picture for a larger image

Size: 31 x 25 x 20 centimetres
Weight: approx. 22 kilograms