The 4th edition is available for sale as a two volume digital download that is also viewable online.
$ 49.95 USD for both volumes!
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VOLUME ONE covers the science of gemmology, including the chemical nature of gemstones, their physical and optical properties, basic
crystallography, the absorption of light, the spectroscope, polarized light, the polariscope, pleochroism, the dichroscope, colour filters, specific gravity,
luminescence, magnification, thermal conductivity, imitation, assembled and lab-created gemstones, gemstone treatments and enhancements, mining, diamond and
coloured gemstone cutting and coloured gemstone and diamond grading.
VOLUME TWO covers the identification of gemstones based on their colour and transparency, ‘Reflections’ consisting of 134 pages of photographs
that capture the true beauty and incredible talent of award winning gem cutter John Dyer, and GEMFACTS that focuses on the seventeen most common gem species and
varieties.
Featuring the photography of internationally renowned gemstone/mineral photographers Tino Hammid & Jeff Scovil, Conny Forsberg, John Dyer, David Dyer, Lydia Dyer,
Priscilla Dyer, Ozzie Campos, Dmitry Stolyarevich, Arjuna Irsutti and Sergey Pryanechnikov.
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