Hi there, fairly new to doing diamond research. I am not engaged but hope to be at some point and just like to be knowledgable and informed. In doing searches here on Pricescope, I have noticed that sometimes the same stone is at both Solomon Bros and USA Certd. Solomon Bros is generally a little less but when you look at the GIA cert it is the same stone. Today, I happened to search Union diamonds and found the same stone that was already listed at Solomon bros and USA as well. What the heck? Where are the actual diamonds? Is there a vault and all the stores list them and then get them in when someone wants to see them? These are probably pretty silly questions but I am so confused! Thank you for the clarification. - Sonya