[Glossy grayish mark on white-yellowish semi-matte glaze]

Thank you very much @PeterH for sharing your insights! Yeah, I like good looking dinnerwares and mugs but I am very worried that I introduce unnecessary risk to my health due to all those not so food safe paints and decorations and glaze…So now I am trying to learn more to ensure that I am getting pretty yet safe products.

[Glossy grayish mark on white-yellowish semi-matte glaze]

@HulkThank you so much for the inputs! I will definitely do some exploration on the public education resources in Bay Area.

[Glossy grayish mark on white-yellowish semi-matte glaze]

Wow, thank you so much for all those information and knowledge sharing! It’s so impressive and I have learnt a loooot!
 

I just developed interests with the whole ceramic, pottery study and I wish I could join your pottery studio, learn more and one day become as knowledgeable and experienced as you! I am located in Bay Area, CA though, if you or anyone who visits this post happen to know any good pottery studio based in Bay Area, please let me know. Thanks in advance! 

[Glossy grayish mark on white-yellowish semi-matte glaze]

Thanks @Callie Beller Diesel! Yeah I am an absolute newbie in this area and really appreciate your inputs! So I can safely assume it is still food safe? I was under the impression that an intact glaze is critical in ensuring the pottery is food safe because the glaze is working as a shield to separate all toxic chemicals inside such as lead paint etc. 

[Glossy grayish mark on white-yellowish semi-matte glaze]

Those spots are also found inside the teapot and somewhere on the body and it doesn’t look like simple scratches. 

[Glossy grayish mark on white-yellowish semi-matte glaze]

Hello, I am new to this community and to pottery/ceramic topic and I really appreciate if anyone could help answer my question. 
 

I recently purchased a Sri Lanka teapot from Studio M, a brand from Marumitsu Poterie, Japan(https://www.marumitsu.jp/webstore/srilanka-l2395/?sl=en) And it’s purposefully made so that it looks a used ceramic teapot. So on their website, it’s mentioned that the glaze color is supposed to have strong irregularity. However, I found it odd to see those glossy spot/speckles on the semi-matte finish. Does anyone know what has caused those metallic, shiny, glossy greyish spot out of the supposed white-yellowish-brownish glaze?

Thanks in advance and really appreciate your help!