Rich, pearly-white crystallised montgomeryite coating fracture surfaces on matrix.
High magnification needed to make out individual, colourless, platy crystals - lovely material!
Several pieces in a plastic box (my original specimen broke up along the fracture lines).  Largest specimen is approx 21x12mm.

Postage combined on multiple orders. International orders over £20 value will be sent via tracked postage.
International postage is quoted or the US (it is now astronomical) - postage to Europe will be less and I will refund you the difference.