Columbite-(Fe) is a very rare mineral at MSH. When found, the crystals are often embedded in matrix and broken. The crystals on this specimen grow freely in small cavities. They are small, but superb, examples for the locality – at least in my experience. There are a total of three crystals. The columbite was confirmed via EDS (see the “Analysis” tab). It is associated with interesting pale golden-yellow muscovite, also confirmed via EDS. You will not see this species offered in this quality from MSH very often.

The first pair of photo (FOV 1.1 x 1.5 mm) is a close-up of the best columbite crystal. It is 0.7 mm long. You can see it clearly with 10-20X, but these photos were taken at the equivalent of about 60X.

The second  pair of photos (FOV 2.2 x 2.9 mm) is a broader view showing the sane crystal along with the muscovite (1.1 mm). The lighting has been arranged to show the iridescence.

The next pair of photos (FOV 1.1 x 1.3 mm) shows the other two columbite-(Fe) crystals on the specimen. The one on the bottom is 0.55 tall and appears to be twinned in the same way as the crystal shown in the first pair of photos. The top crystal is more blocky.

Single item shipping weight (with MM case) is 2.7 oz (76 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.