EVOLUTION OF FACETING MACHINES
Web site: www.glennklein.com
141 Pages 141 Pictures 100 in Color
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This book is a study of the changes and progress made
through the centuries to cut and polish colored
gemstones with the use of faceting machines.
For Centuries "Native Cut" (faceted in third world
countries) stones have been cut and polished with the
use of machines driven by hand power. These are
poorly cut gemstones that continue to be created
today and can easily be found in some of today's
jewelry stores. The goal has been to just create some
facets all over the stones which can be polished
"stone" sparkle. There is no thought as to what
angles are used or what quality of polished surfaces
are created. The main goal is to end up with a
gemstone that has as much weight remaining as
possible. That is because the more carats the gem
weighs, the higher the customers cost will be.
Modern facetors often use the Native Cut stones as a
piece of rough, a starting point for truly creating a
much more beautiful and brilliant gemstone. Of
course these improvements cause the gemstones to
loose weight, but they are much more beautiful and
valuable gemstones when completed.
Later, Jamb Peg machines began to be used and still
are used today. The power source for these machines
has been hand power, water power, steam engine
power, and finally electricity power. But these too are
call "Native Cut" stones and are considered to be
poor quality gemstones.
It has been just in the past 75 years that mechanical
faceting machines have been invented in the more
successful countries, and have steadily been improved
so that far more accuracy in the cutting, polishing, and
properly placing of facets is obtained.
These faceting machines have evolved into several
types, such as Mast and Staff machines, Large
Quadrant machines and Platform and Hand Piece
machines. Most recently Concave faceting machines
along with Fantasy faceting machines have been
invented. These are used by skilled facetors to create
a combination of faceted and carved gemstones. It is
truly amazing what these gemstones look like when
completed by very talented facetors.
The authors book also covers the progress of design
patterns, which faceters need to follow to achieve the
best light return and brilliance from the mineral they
are working with. The angles used and the placing of
facets differ one mineral species to the next. This all
becomes very important for finishing with a one of a
kind, no other like it in the world GEM.