Not really watches but - need a jewellers help?

[RustyBin5]

My mum just asked me if I can get some rings identified. ie if gold silver platinum or whatever or if plated. Stupidly I agreed to try but quickly discovered that markings on rings are a dark art and I have no clue what I’m looking at

Can anyone shed light on these 4?

1.

2.

3.

4.

1. Looks a good quality ring with 5 largish diamonds 2. Looks like an eternity ring with sapphires 3. Looks a bit odd very golden and buttery colour with a solitaire mount (no idea if diamond or zirconia 4. Looks an older ring (Victorian?)

[J3w3ll3r]

1 is 18ct yellow gold
2 is 14ct yellow gold although that’s not an official british hallmark so it must be looked upon with caution
3 is gold plated silver
4 looks like silver to me but can’t be sure from that pic so more investigation would be needed to be sure


Likely 1 is diamond, 2 diamond and sapphire

The other 2 likely to be CZ

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[RustyBin5]

Thank you !!!