Browsing Archive: February, 2015

Volcanoes - a red hot love affair

Posted by Site Moderator Webmaster on Monday, February 23, 2015,


If you remember, last November, TVJ (with the aid of Malcolm and his photos) gave us a very interesting talk on zeolite minerals. These minerals are to be found in ancient lavas that flowed out millions of years ago from volcanoes such as those at the Etendeka Plateau in Namibia or the Deccan Trappes in India. Later such minerals as analcime, chabazite, heulandite, and apophyllite were created by mineral rich solutions percolating through the porous rock and filling the residual cavities, k...


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Sing in the New Year

Posted by Site Moderator Webmaster on Monday, February 23, 2015, In : Lapidary 

André Bergh gave a talk and demonstration of what were described in the last newsletter as “quartz singing bowls”. But as things turned out, the bowls were made of frosted glass, in China. There was a selection in various sizes, and they are tuned to musical notes. When tapped with a drumstick, or using one in a stirring motion rubbing against...


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