Any marking on the metal setting may be a style identifier, or other key to some category. These marks never reflect or identify the gems held by the setting.
what does pt mean on diamond ring
c = diamond
It refers to the weight of the diamond.
Diamond Essence - simulated diamond
It is the authenticity of the diamond contained inside your silver ring.
c = diamond
Size of ring?
A diamond promise ring has many meanings, but they generally means that the giver of the promise ring will be faithful to the receiver of the promise ring.
Vargas
its probably the manufacturer
1 karat
The wearer is protecting the diamond ring because it is worth more than the band.