Blue Amber (fluorescent)

Item Description

This is a first-class specimen of the rare and desirable Blue Amber from Indonesia. A couple years ago, we acquired a small parcel of these eye-catching stones, which are different from other Ambers because they display a fantastic color change effect, showing an alluring BLUE color on the surface in sunlight, and a rich reddish-golden hue in indoor lighting, when backlit. According to GIA, this blue color is actually the result of fluorescence when exposed to UV sunlight, which makes sense because, these stones fluoresce a vivid blue color under both SW and LW UV light! You can compare this to the daylight fluorescence seen in Fluorite crystals from various localities in Weardale, England. Additionally the GIA website states that these Amber stones, "also showed the Usambara effect, the phenomenon in which color varies with the path length of light through a sample". I have been told that this is true Amber, not younger Copal, as the stones show no reacting to acetone. This piece is a beautiful polished specimen weighing 4.31 grams, with excellent internal transparency, and beautiful fluorescence as you can see from the video. A really cool piece for any fan of Amber or fluorescent material.