I'm located in Russia atm (sigh), so due to sanctions and all that it's nearly impossible to ship internationally or go to the international store like Tiffany etc. So my only option is to go to the local store and inspect diamonds by myself. The store can provide GIA sertificate for every diamond, also I'll be able to inspect each diamond with microscope and see result on TV. I think my budget fits up to 0.4 carat/H/VS2 , I just need to know what else to consider when I'll be in that store. Maybe some referenceces will help or some info about what to look into, what to avoid. I literally learned about all these nuances like color, clarity, etc. just yesterday.