www.925-1000.com

Not strange those marks are real tiny but good visible with a jeweler's eyeglass loupe. I believe your first image, the eye reads 3m to fit a 3mm (diameter) chain. If solid gold this fairly modern cross should be marked minimal with; 9K,14K, 18K, 20K or 22 K or 375, 585, 750, 833 or 916. Please che...

What's strange for me is that marking is really really small

oel wrote:I advise you to go to a good jewelry shop and ask for their assistance. Or Google search for gold test
Good luck.

Thank you :)

oel wrote:Hi, welcome to the forum

I believe it to be gold-plated and it could be a French gold plate mark.

Best,

Peter

How can I check if it is gold plated?

An item itself

Hello dear people. I have this cross (golden maybe?) and there is unknow marking on it. Maybe someone could help me to identify it. Thank you. https://preview.ibb.co/iNNGHm/IMG_20171116_102111_HDR.jpg https://preview.ibb.co/jDJqcm/IMG_20171116_102144_HDR.jpg https://preview.ibb.co/eZyZ3R/IMG_2017111...