![Are rubies *always* fluorescent? Have you ever seen one not fluoresce? What about rubies from Madaga Are rubies *always* fluorescent? Have you ever seen one not fluoresce? What about rubies from Madaga](https://static.wixstatic.com/media/f4ef11_c1ac7d75f832420c847a57615950b2dc~mv2_d_1600_1600_s_2.jpg/v1/fill/w_1000,h_1000,al_c,q_85,usm_0.66_1.00_0.01/f4ef11_c1ac7d75f832420c847a57615950b2dc~mv2_d_1600_1600_s_2.jpg)
Are rubies *always* fluorescent? Have you ever seen one not fluoresce? What about rubies from Madaga
![Unknown blue gemstone on the left. Ruby on the right. Both glow the same color of red under UV light. Help me identify the blue gemstone please. : r/Gemstones Unknown blue gemstone on the left. Ruby on the right. Both glow the same color of red under UV light. Help me identify the blue gemstone please. : r/Gemstones](https://preview.redd.it/unknown-blue-gemstone-on-the-left-ruby-on-the-right-both-v0-n9or7t8dlmma1.png?width=640&crop=smart&auto=webp&s=56b7f56a9309cf2a18023f4495281f4b14801db8)
Unknown blue gemstone on the left. Ruby on the right. Both glow the same color of red under UV light. Help me identify the blue gemstone please. : r/Gemstones
![Completely unaltered, unfiltered color of the rubies under UV light. I've never seen a red like this in nature before. From the famous Jegdalek deposit in Surobi District (Sorobi District), Kabul, Afghanistan : Completely unaltered, unfiltered color of the rubies under UV light. I've never seen a red like this in nature before. From the famous Jegdalek deposit in Surobi District (Sorobi District), Kabul, Afghanistan :](https://i.redd.it/t5b7xlqmbo571.jpg)