The ornamental design for a gemstonesetting, as shown and described.
FIG. 1 is a top perspective view of a gemstone setting according to the present invention, the gemstone cut shown in broken line forming no part of the claimed design;
FIG. 2 is a bottom perspective view of a gemstone setting according to the present invention, the gemstone cut shown in broken line forming no part of the claimed design;
FIG. 3 is a top view of a gemstone setting according to the present invention, the gemstone cut shown in broken line forming no part of the claimed design;
FIG. 4 is a bottom view of a gemstone setting according to the present invention, the gemstone cut shown in broken line forming no part of the claimed design;
FIG. 5 is a side view of a gemstone setting according to the present invention, the gemstone cut shown in broken line forming no part of the claimed design;
FIG. 6 is a top view of a gemstone setting according to the present invention; the bracelet additional gemstone setting, and gemstones shown in broken line forming no part of the claimed design; and,
FIG. 7 is a top view of a gemstone setting according to the present invention, the ring , additional gemstone setting, and gemstones shown in broken line forming no part of the claimed design.