Marble as base material?

[macsnap]

Hi,

I'm new here and hoping someone can help. I'm attempting to clean up a couple of pieces and I don't know their history. The silver plating has come away in one place and it looks like marble underneath. Base stand is metal and appears to be glued to the marble. They're heavy - 115g each and 9cm tall. Base stamped EPS.A1 and the logo PRP in a circle. I've never heard of marble as a base material for plating. Can anyone help with either restoring the silver plating or the origin of these? Any comments on the marble - was this a common practice? If not marble what is it? Not attracted to magnets at any point and the marble part is very hard and pitted.

Cheers,

Snappy

Edited March 27 by macsnap
Trying to reduce reasons for moderation

[ChrisSilver]

Should really be in the non PM section, but as you do not currently have Premium Membership and it is somewhat related to silver I will approve this post so others can reply to your question  please do consider upgrading your membership though as it provides many benefits for members and also supports TFS too: https://www.thesilverforum.com/store/category/2-premium-membership/

[KevjustKev]

That isn't marble, and that's for sure. Marble would crack under heat and doesn't pit.

[ZRPMs]

Could it be some sort of cement based product? Similar to concrete. Mixed, Poured in to moulds. Then once cured the silver is placed over the top. Try a small drill hole with a masonry bit but without the hammer action on. Look at the drilling dust. Might give you a better idea. Difficult to tell from just the pictures.

[AaaGee]

Onyx stone?

[KevjustKev]

2 hours ago, AaaGee said:

Onyx stone?

Onyx is a type of marble