A glowing yellow "gem" of intergrown microcrystals showing intense color saturation and an unusually high luster for the species. It glows with a color like a lemon peel, as if it was made of sparkly sugar crystals. This superb example of its species from the personal thumbnail collection of (semi-) retired dealer Charlie Key whom is certainly, in my book, the top dealer in African minerals in our lifetimes. I obtained this collection in 2008.