Rare Blue Amber Polished Slab Pendant. The term Blue Amber comes from the fact that when the amber is subjected to Ultra Violet Light from strong sunlight it will turn blue. This amber is 100% Genuine and is around 15 - 25 Million years old and is the resin from a Hymenaea protera tree. This section is around 60mm long, excluding the 925 solid silver fitting. We pay UK Postage