Nearly all blue topaz begins as colourless material and is turned blue by irradiation, a process developed in the twentieth century. Natural blue topaz exists but is pale and scarce enough that it is almost never seen in jewellery, which makes the colour on this dial a modern invention rather than an old one.

The white gold case measures 37 mm with a gem-set bezel. The white gold dial is set with baguette-cut blue topaz and carries white gold Royal Oak hands. The watch is completed on a white gold bracelet set with baguette-cut blue topaz with an AP folding clasp. It is the palest of the stones in the 37 mm set and reads closest to a diamond-set Royal Oak until seen up close.

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