The Diamond Tension Ring
The Diamond Tension Ring was originally introduced in Germany in 1979 as a new, modern way of setting a precious stone, without the prongs.
The single brilliant and seemingly floating diamond sits firmly between precisely cut tiny grooves and is exposed to a tremendous amount of pressure per square millimeter. This is why only the hardest gemstones like diamonds, sapphires and rubies can be pressure-set.
The lateral pressure holds the gemstone within a spring hardened ring shank and such, light enters from all angles to maximize its brilliance.
Each ring is a feat of engineering and exquisite design.