- Joined
- Nov 21, 2002
- Messages
- 2,326
My questions come from Observing the working model GIA has published on it''s website on the illustration of star facet length & how it affects a stones profile face up and how the other facets change and vary in size and angle based on that length.
I am wondering is the Facet length and angle of a star facet & upper girdle facet dependent on one another.
It would seem if a cutter cuts the upper girdles at a steeper angle it would affectively in turn shorten the star facet length where it extends out to the outer most tip at the junction where the 2 facets meet and cutting longer star facets would decrease the upper girdle angle.
Am I right in my assumption that with set crown & pavilion angles and a given table, that the kite, star, & upper girdle facets are all connected and a subtle change in the angle a star facet or upper girdle facet is cut will affectively change the other facets which are connected and dependent on the way the connecting or adjoining facets will look including facet angle/height/width variation but will not affect any other aspect of the stone like the table, crown angle or pavilion angles?
-Josh Rioux
Sitka, Alaska
I am wondering is the Facet length and angle of a star facet & upper girdle facet dependent on one another.
It would seem if a cutter cuts the upper girdles at a steeper angle it would affectively in turn shorten the star facet length where it extends out to the outer most tip at the junction where the 2 facets meet and cutting longer star facets would decrease the upper girdle angle.
Am I right in my assumption that with set crown & pavilion angles and a given table, that the kite, star, & upper girdle facets are all connected and a subtle change in the angle a star facet or upper girdle facet is cut will affectively change the other facets which are connected and dependent on the way the connecting or adjoining facets will look including facet angle/height/width variation but will not affect any other aspect of the stone like the table, crown angle or pavilion angles?
-Josh Rioux
Sitka, Alaska