Method of manufacturing diamond tool intermediate and method of making determination for single-crystal diamond

A method of making a determination for a single-crystal diamond, the method comprising:

• a first step of preparing a single-crystal diamond having a first facet plane that is a plane perpendicular to a specific crystal orientation;
• a second step of fixing the single-crystal diamond to a support so as to maintain a relation between a crystal orientation of the single-crystal diamond and a posture of the support based on the first facet plane;
• a third step of capturing an X-ray image of the single-crystal diamond, the X-ray image being an X-ray image in which the crystal orientation of the single-crystal diamond is associated with an X-ray emission direction by fixing the single-crystal diamond to the support and associating the support with the X-ray emission direction;
• a fourth step of specifying a position of an inclusion of the single-crystal diamond in the single-crystal diamond based on the X-ray image;
• and
• a fifth step of determining whether or not a shape of a diamond tool intermediate is extractable from the single-crystal diamond with the inclusion being not included in an inclusion-excluded region, the shape of the diamond tool intermediate being a shape in which diamond crystal orientation and outer shape set in advance are associated with each other and which entirely consists of the inclusion-excluded region or being a shape in which the diamond crystal orientation and outer shape set in advance are associated with each other and which consists of the inclusion-excluded region and an inclusion-permitted region, the determination being made based on the shape of the diamond tool intermediate, the X-ray image of the single-crystal diamond in which the crystal orientation of the single-crystal diamond is associated with the X-ray emission direction, and the position of the inclusion associated with the X-ray image of the single-crystal diamond.