Fluorescent Zircon Crystal 4. Also known as a Zircon Bomb. Deep red brown colour in the sunlight and fluorescent yellow under UVA and UVC. It is rare to get yellow fluorescent minerals let alone in Crystal form. A super collectors specimen and rare. Classic location too. I spoke to the Professor about the fluorescence source and he suspects it comes from a mild form of radiation. Thus also not a good idea to cut these gemstones into pendant, as it is worn close to the Thyroid Gland.
4.7cm x 4.1cm x 4cm, 149g.
Mud Tank, Northern Territory, Australia.