Ruby kyanite’s fluorescence under UV light can be attributed to the presence of trace elements such as chromium, which is associated with the red color in rubies. Additionally, other elements like iron or manganese may contribute to the fluorescence. The specific combination of these trace elements and their interactions with the crystal lattice structure of kyanite can lead to the unique glow observed under UV light. It’s a captivating phenomenon that adds an extra layer of allure to the already stunning ruby kyanite.