Read Yogo: The Great American Sapphire by Stephen M. Voynick Online

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The colorful story of the Montana mine that produces the prized Yogo sapphires has been updated in this revised edition....

Title : Yogo: The Great American Sapphire
Author :
Rating :
ISBN : 9780878422173
Format Type : Paperback
Number of Pages : 219 Pages
Status : Available For Download
Last checked : 21 Minutes ago!

Yogo: The Great American Sapphire Reviews

  • joyce
    2018-11-16 07:04

    I love this book! As an "under-the-rock" hound (not a geologist `er anything) this combines my love of history & geology. Not many folks know about the American Sapphire, the Yogo. These are great sapphires because they're never heat-treated, the stone's color is always natural & ranges from cornflower to deep blue. Usually small stones. The dike that the sapphires are mined from is interesting because the miners break down the matrix & let the sapphires weather-out. The book has lots of pictures of the Yogo mines in Montana from the end of the nineteenth century through the beginning of the twentieth century.

  • Linda
    2018-11-27 05:04

    Yogo: The Great American Sapphire is a great book to have on hand as a reference. A good supplement is the August 2010 copy of Montana magazine which contains a wonderful article about what is going on in yogo country near Utica, Montana. Yogo sapphires are the only sapphires that do not have to undergo a heating process to enhance the beauty of the stone - lovely.

  • Candy
    2018-11-10 07:58

    Using this for a research paper in an Appraisal class, always fascinated with colored gemstones. I am a gemologist and retail jewelry is my gig now.