The earth is a big place with a lot of out-of-the-way places where Mother Nature has created some truly odd and amazing geological formations. Here are pictures of what are frequently described as the 25 strangest geological formations on Earth -- locations that for the most part I had never heard of or seen before. Enjoy!


China's Zhangye Danxia mountains were formed on red terrigenous
sedimentary layers that have been eroded for 24 million years.

  • Created By : 22-Mar-2016
  • Write By: tmmadmin
  • Published In: Mineral Show Reports
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I still can barely believe how many new, colorful, and exciting specimens we brought home from the Tucson Show this year; this made picking out my favorites really difficult. Here are twenty-five new specimens that I think are significant and highly aesthetic which I love. They will give you an idea of what we found. If you are interested in any of these specimens, just click on the "for sale" links to go to the pages in our website where you will find that piece for sale. Or, you can email me by clicking here to find out what else we have in inventory.

  • Created By : 22-Mar-2016
  • Write By: tmmadmin
  • Published In: Mineral Show Reports
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Downtown Tucson

Near the start of every year, Tucson becomes the world's biggest playground for everyone interested in gem and mineral trading, buying, bargains and bragging rights. Tucson is quite literally 3 weeks of mineral madness, pulling in thousands of treasure hunters from every corner of the globe.

  • Created By : 21-Jan-2016
  • Write By: tmmadmin
  • Published In: Your Collection
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by Tim Jokela, Jr.

This is a list of abbreviations and unusual jargon commonly used by mineral collectors. These are the more common terms a neophyte collector is likely to be confused by. Explanations of the terms are kept short in the interest of brevity. Sources of definitions and some terms include Sinkankas' Mineralogy and a 1974 editorial by John S. White Jr., in MR V5 #2.

  • Created By : 20-Jan-2016
  • Write By: tmmadmin
  • Published In: Your Collection
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A sneak peek inside the Treasure Mountain Mining photo studio

I admit it - I love it when people tell us that they think we have "the most beautiful crystal and fine mineral photos on the internet." While we enjoy the compliments, the real stars of the show are the minerals themselves - bright red rhodochrosite, canary yellow sulfur, emerald green fluorite, cornflower blue tanzanite, and so on. When we take photos, we are 100% focused on accurately capturing the true colors of these amazing minerals. Because every specimen is truly unique, we photograph every single specimen. And, what you see is what you get: We do not take "generic" pictures, and then send the buyer a different piece. Here is the scoop on what we do when we take photos.


Rock face showing embedded pyrite crystals

by David Rusterholz

David contacted me in the summer of 2015, to ask about going to Navajun to collect. He is an avid collector, Chemistry Professor Emeritus at the University of Wisconsin-River Falls, and President of the St. Croix Rockhounds of Stillwater, MN. David asked a bunch of questions about what it is like collecting at Navajun. Apparently I answered his questions satisfactorily because in late November he and his wife Becky Kleager made the pilgrimage to Navajun, Spain to do some pyrite collecting at Mina Ampliación a Victoria. Below is his report. -Eric