Wavellite, a fairly rare, aluminum phosphate, is known for forming rounded radial crystal aggregates. It's widely known to be green, but, like Prehnite for example, lesser known colors are grey, white and creamy white colors. At the Siglo Veinte mine in Llallagua, Bolivia(or the Siglo XX mine, as it is sometimes referred to...), Wavellite does, aside for green, often present in the colors white, grey and a beige cream color. Yet, the crystals maintain a typical rounded crystallization form, and the luster is a very "resinous" or pearly one, a bit similar to Smithsonite, except that Wavellite is much lighter, weight wise. Wavellites from Llallagua are very distinct and excellent in their formation, and often will form on Quartz or with other rare phosphate minerals, like Vauxite or Paravauxite.. This is an excellent example for this mineral.This specimen is 4 1/4 oz in weight, or 119 grams. The size is 2.5 inch x 2 inch x 1.5 inch. Please be advised, I ship with Ground Advantage.