2. How to identify a cream diamond? You can't tell if it's a cream diamond from the certificate. The easiest way is to compare diamonds of the same grade. Here, I show the landlord a comparison map.
3. Is the landlord worried that diamonds are cream diamonds because diamonds are too cheap? The so-called global diamond spot is also called futures diamond. Generally speaking, futures diamond ring is a business model chosen by businesses with relatively limited strength in order to save costs and transfer risks. However, some small businesses will also adopt this sales method in order to avoid costs.
The landlord had better wait for the real thing before judging whether it is a cream diamond. If it is a regular big business, there is generally no risk. The price of this grade of GIA diamond is around 6000, so the landlord need not worry too much.