Fascinating discovery of the appearance of Jewels in pure light. Diamonds, rubies and garnets go black. But the rainbow like quality of the 12 stones spoken about in the Book of Revelation 21:19-21 NKJV are revealed in pure light, technically identified in this century as anisotrooppiset light.
19 The foundations of the wall of the city wereadorned with all kinds of precious stones: the first foundation was jasper, the second sapphire, the third chalcedony, the fourth emerald, 20 the fifth sardonyx, the sixth sardius, the seventh chrysolite, the eighth beryl, the ninth topaz, the tenth chrysoprase, the eleventh jacinth, and the twelfth amethyst. 21 The twelve gates weretwelve pearls: each individual gate was of one pearl. And the street of the city was pure gold, like transparent glass.“
The Twelve Gems.