What is most amazing about the Taj Mahal is the fine detailing. The coloured inlay is never allowed to overwhelm the design, as carvings done in relief sensitively balance it. The ornate pietra dura and relief carvings are of floral, calligraphic and geometric designs. However, flowers remain the main decorative element as the tomb depicts a paradise garden. The skill of the inlay worker is so fine that it is impossible to find the joints, even when as many as 40 tiny pieces of semi-precious stones have been used in the petals of a single flower. Some of the best calligraphy of Koranic verses can be seen around the entrance arches and on the two headstones.