The closure should not look or feel separate. A single latch clasp made in matching yellow, white, or rose gold, or sterling silver, keeps the jewelry consistent in both metal and finish.
Visually Speaking
On a lobster clasp, the lever tab projects from the body and must be retracted by finger pressure to open the gate. The mechanism is external and visible from any angle. On a push button clasp, the release button sits flush with the outer surface and triggers an internal spring when depressed. The body of the push button clasp presents a smooth exterior with no projecting elements. Both mechanisms are legible by touch, but only the lobster clasp is legible by sight from a distance.
Responsible Beauty
Lab-grown diamonds remove land disruption from the environmental equation, but the full picture depends on the energy source. Facilities powered by renewables represent the lowest-impact production, while those running on fossil fuels carry a different footprint. These are factors worth asking about if environmental factors are driving your choice.