Over the years modern society has brought a lot of science to the art of gem cutting. This page is for places to find diagrams, mainly free. As always if you know of a link that should be here please let us know. info@polymetricinc.com PROGRAMS GemCadThis is a great program to design your own and he...

"A" Dop arm (adjustable for concentricity to .00025 runout). The dop arm has a reference point for radial alignment. This is a cone pointed set screw in the dop arm which corresponds to the groove in the dop for round stones. "B" Radial tooth index splitter: Knob is marked "R", "L", right and left t...

PRISMATIC INSTRUMENTS, INC. is pleased to announce that after several years of research we have designed and developed a facet heat which derives the angle of cut from an LED electronic digital readout display meter. This digital display meter has a synchronous reading with the movement of the dop a...

Prismatic Combo Unit I now have this model. It was also produced as a protractor angle read out which I am interested in finding. Send mail to webmasterwith questions or comments about this web site. Copyright 2006-2009 Poly-Metric Instruments, Inc. All Prices Subject To Change Without Notice. ...

1. Precision four jawed collet chuck; this chuck is a threaded self-centering type. Operated by hand, no set screws to cause misalignment due to uneven adjustment or pressure. The chuck head is hexagonal which allows a wrench to be used for tightening or loosening if needed by individuals having art...