Allophane from Mexico
Allophane has short-range atomic order, it is a mineraloid, rather than a mineral, and can be identified by its distinctive infrared spectrum and its X-ray diffraction pattern. It forms waxy botryoidal to crusty masses with colour varying from white through green, blue, yellow, to brown.
This specimen shows great under a UV light. I will get some pics of this up soon.
I acquired this specimen from Tony at The Mineral Store at the August 2016 Sydney Crystal Show.
Chemical Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O
ID #: JG0009
Colour: White, light-blue, green, brown
Acquisition Date: 06/08/2016
Crystal System: Amorphous
Dimensions: 39mm x 28mm x 15mm
Rarity of Mineral