The National Geographic Magazine, Volume 98National Geographic Society, 1950 - Geography |
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Page 806
Mineralogically , the peridot ( page 790 ) is Jade chisels have also been recovered from the silicate of magnesium and iron called the remains of the early Swiss lake dwellings . olivine . It is undoubtedly the gem known Early Middle ...
Mineralogically , the peridot ( page 790 ) is Jade chisels have also been recovered from the silicate of magnesium and iron called the remains of the early Swiss lake dwellings . olivine . It is undoubtedly the gem known Early Middle ...
Page 808
A properly cut sphene shows numerous which reason it is sometimes called “ Bohemian flashes of red and blue light , approaching an ruby . ” opal in the intensity of its colors . Spessartite , a manganese aluminum silicate , There is no ...
A properly cut sphene shows numerous which reason it is sometimes called “ Bohemian flashes of red and blue light , approaching an ruby . ” opal in the intensity of its colors . Spessartite , a manganese aluminum silicate , There is no ...
Page 809
A yellow variety is called citrine , are controlled by wafer - thin plates cut from erroneously topaz . Since natural citrine is rock crystal . This peculiar property makes it rare , the commercial product is obtained by useful for many ...
A yellow variety is called citrine , are controlled by wafer - thin plates cut from erroneously topaz . Since natural citrine is rock crystal . This peculiar property makes it rare , the commercial product is obtained by useful for many ...
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Contents
Here Come the Marines By Frederick Simpich 647 | xxii |
Largescale Western Europe Map First in New National Geographic Series Text accom | xxviii |
New National Geographic South America Map Shows a Continent Coming of Age Text | xli |
Copyright | |
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