Ikeda - Tourm One By Two

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Tourm One By Two - Hideki Ikeda

This design is good for the RI 1.62 and higher. It is excellent for tourmaline crystals with high recovery.

There is no surprise in cutting. However, there are a few areas for a faceter to pay more attention. They are (1) the four crown corners where the facets B, C, D and E meet, (2) the facet J which cuts very quickly and (3) the shallow cutting angles of The facets F and I.

If there is more material above the girdle, the crown can be safely raised by 10% by tangent ratio. In the picture of the pale blue green tourmaline, the crown has been raised by 10%.

Click on this link to download the gemcad file: File:Tourm1x2.gem

Click on this link to download the pdf file: File:Tourm1x2.pdf

Hideki Ikeda Photos