Gemstone profiling

A method of profiling a gemstone, the method comprising:

• rotating, using an actuator the gemstone mounted in a holder through a plurality of orientations;
• measuring, using a non-contact measuring unit fixed with respect to the gemstone, a distance of a reference mark on the gemstone from the non-contact measuring unit in each of the plurality of orientations;
• determining a primary dimension of the gemstone in each of the plurality of orientations, based on the distance of the reference mark from the non-contact measuring unit on the gemstone in respective orientation of the gemstone, wherein the primary dimension is relevant for processing of the gemstone, the primary dimension being a distance between a center of the gemstone and a surface of the gemstone measured at the reference mark;
• and
• generating a profile of the gemstone based on the primary dimension in each orientation of the gemstone, wherein the gemstone is processed based on the profile.

A controller for a gemstone profiling system, wherein the controller is to:

• operate an actuator to provide a complete rotation to a gemstone mounted in a holder, wherein the gemstone is rotated intermittently through a plurality of positions;
• ascertain, from a non-contact measuring unit, a distance of a reference mark on the gemstone from the non-contact measuring unit in each of the plurality of positions;
• determine a primary dimension of the gemstone in each of the plurality of positions, based on the distance of the reference mark from the non-contact measuring unit on the gemstone in respective position of the gemstone, wherein the primary dimension is relevant for processing of the gemstone, the primary dimension being a distance between a center of the gemstone and a surface of the gemstone measured at the reference mark;
• and
• generate a profile of the gemstone based on the primary dimension in each position of the gemstone, wherein the gemstone is processed based on the profile.