MSH is the type and only known locality for gricete. It was found only in the sodalite xenoliths and was very uncommon even in there.

The first photo (FOV 2.9 x 2.1 mm) shows an aggregate of rounded yellowish cubes about 0.6 mm in extent.

Gricite generally does not form sharp crystals and looks “sugary” or botryoidal even under a scope. The second photo (FOV 1.8 x 1.3 mm) is an extreme close-up that attempts to show that there are some actual cubes here, the sharpest one being the one on the bottom which is about 0.1 mm on edge.

The griceite in the third photo (FOV 2.4 x 1.6 mm) spans only about 0.3 mm.

You will need 30-50X to view this stuff.

Some of the aegirine etc. on this specimen has a crust of tiny glassy crystals that I have not been able to identify. There are also some sprays of white fibers that look like lintisite. But they have not been analyzed and could be many other things (natrolite etc.)

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Outside the USA, the stated postage and packing rate applies up to a total weight of 8 oz (225 g).

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Outside the USA, the stated postage and packing rate applies up to a total weight of 8 oz (225 g). It is no longer possible to save on postage by using a padded envelope.

Within the USA, there is a nominal increase of $0.20 for each additional ounce. Above 13 oz, I will use Priority Mail. Up to 16 oz, the “own box” Priority rate is $8.50 (including packing).

Please see my "Shipping Policy" for details.