I am adding pics from my friend’s necklace too. We both had stones we wanted to reuse into something to be worn more often. She did this one in all diamonds and she spaced her’s a bit higher and wears her’s doubled.
The diamonds from the 5 stone were all .20 carat or approximately 3.75 mm and the 2 day diamonds from my earrings were .30 or or around 4.25 mm. I put those two at the top on each side. The sapphires were .25 and faced up around 4 mm. There are 15 stones in total. The size difference between all the stones are so minor that in a bezel, I can’t see a difference.
My friend did one as well because she had a piece of broken jewelry not being used for many years. She had 18 stones that were .15 carat each (3.25mm).