Fluorescent stones /sapphires

[azelismia]

I saw there was another thread on this from last year but it won''t let me respond to it. I have a question about fluorescence in sapphires. do only natural sapphires fluoresce if they''re going to fluoresce or will simulated sapphires fluoresce too? is it a decent ( maybe ) kind of test ( I know that all natural sapphires do not fluoresce but only some) Like if it does have it it''s real? but if it doesn''t have it it may or may not be real?

 

[ma re]

Synthetics also flouresce but most often differently than the naturals, so that''s also used as an identification method.