Open creo, create a new part, and use the blending command. After mixing, click the red cross section, click "Define" under the cross section to define the internal sketch, select the top surface as the datum plane, enter the sketch, click "Align" to draw the first cross section (the bottom point of this cross section is a diamond), and check after drawing. Select the top surface as the datum plane. After drawing, click Align to draw the first cross section (this cross section is the lowest point of the diamond), and check after drawing. Click the section again, enter the dimension offset from the section 1 as 16, and then click Sketch to draw the second section. Click the color palette in the sketching environment, select the octagon in the pop-up dialog box, press the left key to drag it out, drag the midpoint of 8 deformation to the coordinate origin, enter the side length of the octagon as 15, then delete the left part of the octagon, connect the two endpoints of 1 2 with a straight line, sketch the mixture of 1, and then mix it to define the section. Draw an octagon with the projection selection chain, disconnect it at the midpoint of the line segment consisting of the point 1 2 (i.e. coordinate origin) (disconnect it by division), then left-click to select the origin, and then right-click to select it as the starting point. Left-click the point indicated by the arrow in the figure, and then right-click to select the mixed vertex to make two mixed vertices respectively. Then draw two center lines (note that they are perpendicular to the edge), break the point, and then draw section 2, with the distance from section 1 of 28. Drag the hexagon out of the palette, drag the center to the origin, enter the rotation angle 1 1.25 degrees, and the side length is 20. Delete the left side of the hexagon, connect the two endpoints, interrupt the center (that is, the coordinate origin), and take the origin as the starting point to make the points that the vertices need to be mixed, as shown in the figure, tick, and mix 2. Then choose fusion, section definition, upper end face of fusion 2, sketch, select projection and draw the above picture. Draw section 2, and the distance from section 1 is 12. The sketch is the same as that in step 10, except that the side length of the octagon is 28. Sketch the mixture 3, then select the mixture, define the cross section, select the upper end face of the mixture 3, sketch, select the projection and draw the above picture. Draw section 2 again, the distance from section 1 is 4, sketch, and draw an octagon on the palette with a rotation angle of 22.5 and a side length of 20. Make the points that need to be mixed into vertices, draw four center lines as shown in the figure, then divide the interruption and draw a mixed 4. Ctrl+ Blend 1，2，3，4。 Select the mirror, and then select the mirror as the right surface. At this point, the whole three-dimensional model of the diamond has been drawn. Import the model into keyshot, select the glass material to attach, adjust the refraction number to a larger value, and edit and adjust the lighting in the environment.