Phillipsite is a common mineral – but not at MSH.

These aggregates are from the Poudrette pegmatite complex – found in 1997. Material form this find was identified as phillipsite (rather than harmotome) by Bill Henderson using optics. No chemistry has been done, but almost all phillipsite from MSH is – Na. (The phillipsite-K listed in the Lapis and Revista MSH special issues of 2000 is apparently an error.)

In most specimens fron this find, the phillipsite terminations form an almost parquet like surface, but here many of the crystals protrude relatively far above the rest and are not grown together. The aggregates look more like a spiky “mace” than a “ball”.

The first photo (FOV 2.5 x 2.0 mm) shows a “mace head” spanning 1.1 mm top to bottom.

The second photo (FOV 4.6 x 3.9) shows several “mace heads” of similar size.

Note: At the hand held level, this is not an attractive specimen, and there is a fair amount of “mineralogical dirt” encrusting some of the matrix and, but much less so, the phillipsite.

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