Caryopilite is a fairly uncommon mineral. This specimen has not been analyzed, but it is ex John Cinaciulli (cianciullite), then curator of the Fanklin Mineral Museum, so the ID should be good.

The caryopilite spherules, which are seen to be rosettes at very high magnification, sit on a matrix of “red ore” – reddish willemite grains with black franklinite. Some of the franklinite has been recrystallized and some crystals show twinning that, along with the high luster, make them look like hetaerolite. But broken franklinite crystals along the edges show that the lustrous crystals on the surface are extensions of ordinary franklinite grains from the matrix..) I don’t know if these lustrous crystals are secondary growths or perhaps the result of etching. (Note: Heataerolite sometimes exsolves from franklinite, but I don’t think that is the case here.)

The first pair of photos (6.2 x 4.5 mm) shows the greatest concentration of caryopilite, along with a few small franklinite crystals.

The third photo (FOV 4.6 x 3.8 mm) is a clearer view of the franklinite (< 0.8 mm on edge).

In addition to the caryopilite anf franklinite, there are numerous whiskers of secondary (or etched) willemite. Some of these are shown in the next pair of photos (FOV 6.4 x 4.1). The twinned franklinite crystals in these photos are <= 0.55 mm.

Single item shipping weight is 3.3 oz (94 g). For shipments outside the USA, up to a total weight < 8 oz (225g), this can be combined with items from this or other auctions for the same postage.

Within the USA, postage increases by about $0.20 per ounce. Above 13 oz, I will use Priority Mail ($9.25 including packing).