Indirect sunlight. Picking up pink phone case and other surrounding colors. As you can see, in one of the pics I am using my hand to block the sun at a certain angle to get the best lighting.
Hmm. I just have an old I-phone but for me, the best pics are actually in the sun when the stone sparkles like crazy. The ring actually looks like if was catching on fire! The indirect light does not make it sparkle as much so I guess it is a personal presence what one wants to see?
I am into sparkly things so I love seeing my ring "catching fire"