Photoatlas of Inclusions in Gemstones |
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Page 22
... gemmologists look on the microscope as both a welcome friend and ally . Gemmological microscopy is subtly refined and thought out . Simplistic in appearance , mod- ern gemmological microscopes are designed to utilize a variety of ...
... gemmologists look on the microscope as both a welcome friend and ally . Gemmological microscopy is subtly refined and thought out . Simplistic in appearance , mod- ern gemmological microscopes are designed to utilize a variety of ...
Page 27
... gemmology are commonly used . For the less exacting gemmological purposes , a simpler method of enhanced contrast had to be found . The problem that still persisted was how to obtain the desired effect of enhanced contrast while ...
... gemmology are commonly used . For the less exacting gemmological purposes , a simpler method of enhanced contrast had to be found . The problem that still persisted was how to obtain the desired effect of enhanced contrast while ...
Page 532
... Gemmologist of the German Gemmological Society and Expert of the Swiss Gemmological Society ) , is one of the leading gemmologists , recognized the world over as an authority on inclusions in gemstones and their imitations . His ...
... Gemmologist of the German Gemmological Society and Expert of the Swiss Gemmological Society ) , is one of the leading gemmologists , recognized the world over as an authority on inclusions in gemstones and their imitations . His ...
Contents
Prefactory Notes | 7 |
The Importance of Inclusions | 15 |
Microscopy and Photomicrography | 22 |
Copyright | |
56 other sections not shown
Other editions - View all
Photoatlas of Inclusions in Gemstones, Volume 2 Eduard Josef Gübelin,John I. Koivula No preview available - 2005 |
Common terms and phrases
albite amethyst andalusite apatite aquamarine beryl biotite blue boehmite Bottom left Bottom right Brazil Brazilian Burma ruby calcite Centre left Centre right cleavage clusions colour colourless cordierite corundum crystallites Darkfield and oblique Darkfield illumination diamond dolomite eclogitic exsolution feldspar fluid inclusions fluorite flux formation fracture garnet gas bubble gemmological gemmologist gemstones glass goethite green growth Gübelin guest minerals haematite healing fissures hexagonal host crystal hydrothermal illu ilmenite inclusion scene intergrowth Koivula lepidocrocite limonite liquid metamorphic microscope million years old mination mineral inclusions natural negative crystals oblique illumination opal origin overhead illumination parallel pegmatitic peridot phase Photomicrograph polarized light prism protogenetic pyrite quartz quartz crystal rock crystal rutile rutile needles sapphire sions spinel Sri Lanka stones syngenetic synthetic emerald synthetic ruby Tanzania temperature Thai ruby three-phase inclusions tiny tion Top left Top right topaz tourmaline Transmitted and oblique Transmitted illumination Transmitted light twin two-phase Umba Valley yellow zircon