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CAD that feels creative

Start with gem upload or an existing STL file. From there, sculpt your design and export a ready-to-cast STL file when you're done.

Upload Certificate

No certificate? Enter measurements manually

Measure with calipers and type the dimensions — ideal for antique and hand-cut stones.

Have an STL already? Import & sculpt it

Bring in any .stl model (in mm) and reshape it with the sculpt brushes, then re-export.

Try an Example

1.52 ct Round Brilliant

7.44 × 7.38 × 4.54 mm · Table 57%

1.8 ct Oval

8.54 × 8.50 × 3.80 mm · Table 57%

2.01 ct Emerald

7.04 × 7.00 × 4.40 mm · Table 63%

1.25 ct Old European

6.85 × 6.80 × 4.60 mm · Table 45%

0.65 ct Rose Cut

6.05 × 6.00 × 2.00 mm · Table 0%

Supports 15 gem shapes including antique cuts (Old European, Old Mine, Rose Cut).

STL files are exported in millimeters at 1:1 scale, ready for casting.