Ruby and diamond cluster ring

This gorgeous Art Deco Style cluster ring features an oval ruby set in the centre within a collet mount with millgrain detailing. Set with four old round cut diamonds above and below the ruby and a slightly larger old round cut diamond set on each side. Each diamond is mounted within individual collet mount with delicate millgrain detailing. All set in platinum. 
The cluster measures 14mm x 16mm. 
Diamond weight in total: 0.72ct calculated.