Compact Diamond and 9ct White Gold pendant. Super simple, very clean and solid 7mm round setting, with a nice solid oval bail for the chain, big enough to handle the endings of a Silver chain if so desired.
The Diamond is a proper white round brilliant cut, F colour, SI clarity. Colour classification in Diamonds runs from D, the most perfect white, perfectly colourless, through E, F, G and H, H being, for the purists, the last classification that can still be called white. I and J can still present as very white if the gemstone is relatively clear of inclusions.
In reality, even experts will struggle to differentiate between E and F, or between F and G, especially where small or smallish Diamonds are concerned.