World-wide, franconite is a very rare mineral, know from only a half-dozen localities. It is very rare in the Saint-Amable sill. This is one half of the only specimen I ever found here. The ID was verified via qualitative EDS. The scan is essentially indistinguishable from scans for franconite from MSH. (See the analysis tab.) I did not notice any UV response, but my UV source is weak and the franconite balls are small.

The specimen is from the contact zone.

FOV in the first pair of photos is 3.75 x 2.3 mm. Individual “puff balls” are <= 0.85 mm in diameter.

Single item shipping weight (no case) is 3.2 oz (91 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 for total weights up to 13 oz ranges from $4.25 to $6.50 (including packing etc) regardless of destination. Above 13 oz, I will use “own box” Priority Mail. The rate, including packing, varies by destination from $7.25 to $9.50.

See my updated “Shipping Policy” for details.