Labyrinth types: Daedalus can create unicursal Labyrinths commonly used as a tool for meditation and spiritual growth, just as it can Maze puzzles: Chartres replica, Classical, Extended Classical, Cretan, Man in the Maze, Extended Man in the Maze, Custom circuits.
Zircon is a zirconium silicate mineral. It is the principle source of the element zirconium (Zr) 1  usually small and inclusion-rich.  Zircon is highly resistant to weathering (maybe the most resistant of any mineral) This, and its high specific gravity, favor its concentration in placer deposits and alluvial gem gravels.
Zircon, ZrSiO4, the principal ore, is pure ZrO2 in crystalline form having a hafnium content of about 1%. Zirconium also occurs in some 30 other recognized mineral species. Zirconium is produced commercially by reduction of chloride with magnesium (the Kroll Process), and by other methods.