It's always a good idea to have your diamond jewelery -- or any jewelry worn often set with precious stones -- inspected (checked) by a jeweler regularly, who can tighten, replace or re-mount stones so they are not lost.
In the Eterna City Pokémon Center, a lady in there gives you the Friendship Checker App for your Pokétch. By touching the Pokémon of your choice, hearts will show up.
You can pay anywhere from a few dollars to several million for a solitaire diamond, since the descriptor - solitaire - simply means that it is a single stone. Every diamond is priced according to its...
One checks the quality of a diamond by hiring a certified gemologist to document the stone. The certificate will include its cut, its carat weight, its clarity and its colour.