it's a simulated diamond from the JCPenney jewelry collection. it has less inclusions than you would find in real diamonds therefore it is clearer than real diamond but looks just as nice if not better.
These diamonds are created in the Laboratory using a "natural tiny tiny seed diamond". These are then grown at the molecular level to create a "PERFECT" diamond (i.e. hardness, color, clarity etc) which even mother nature can't create over millions of years.
So to answer, yes these are "real" diamonds (i.e. same atomic structure) but they are grown in a lab vs being extracted from the earth.
If your diamonart is set in sterling silver then yes. I wouldn't clean any other types of metal in sterling silver cleaner. There is a specific cleaner for each metal type because of the chemical reaction. A solution of half water and Mr. Clean with a small amount of ammonia can be used for all metal types and is safe with all types of fine jewelry. Even pearls, opals, and emeralds.
Yes. The stone is a synthetic stone or what is called a CZ (cubic zirconium). The metal type of the DimonArt rings I have looked at is sterling silver. Your jewelry cleaning solution is selected by the metal type of the jewelry so if you have a sterling silver DiamonArt ring you would use sterling silver jewelry cleaner. Store bought jewelry cleaner works fine or you can use half Mr. clean and water with a small amount of ammonia. I will add a link to an article that explains how to do it.
These diamonds are created in the Laboratory using a "natural tiny tiny seed diamond". These are then grown (using the same mother nature process, high heat, high pressure with vaporized pure carbon) at the molecular level to create a "PERFECT" diamond (i.e. hardness, color, clarity etc) which even mother nature can't create over millions of years. So these are "real" diamonds (i.e. same atomic structure) but they are grown in a lab vs being extracted from the earth.