The setting is very unique and very old for this oval cut deep red Garnet set high above a rose gold setting.
Gemstone:
Garnet
Cut: oval facet (mine cut)
Size (L x W): 10 x 8mm
Weight: 2 Carats (approx)
Setting:
9K Solid British Rose Gold (9K is the standard in the UK)
Ring size: 5.5 (easily sizable for free)