Microminerals and Micromounts: A thru L- generally require magnification. Matrix is usually TN (thumbnail) or smaller.
For microminerals M thru Z, click here
For an explanation of abbreviations used, please see our guide to mineral sizes.
Actinolite - Ducktown, Tennessee. Coarse blades of pale green to brownish-green actinolite. Puttied in a paper box.
#M292 ... $2.50
Azurite - Kelly Mine, Magdalena, NM. Blue, lustrous micro xtls in limonitic matrix. With minor malachite, etc. Best at 20x or higher. Unmounted.
Photo shows a representative specimen but not the exact one you are buying. We have several of these.
#M278 ... $3.50
Cerussite var. "Chrome Cerussite". Adelaide Mine, Dundas, Tasmania. Yellow xtls in limonitic matrix. No mag. required, but nice at 10x.
Matrix size approx. 2" (~ 5 cm) max. Crystals are typically ~ 1/16" across.
"Chrome cerussite" is yellow for some reason other than Cr. See http://gsa.confex.com/gsa/2004AM/finalprogram/abstract_77733.htm.
#CR278 ... $25.00
Chalcocite, Calcite, and an unidentified dull yellowish-tan mineral - Watchung Mountains, New Jersey. Someone out there probably knows what that third mineral is; we haven't had time to do the research.
Specimen puttied in a white paper "micro" box.
#M297 ... $2.50
Chrysocolla, "stalactitic" form - Morenci, AZ. Puttied in a small paper box.
#M290 ... $3.00
Gold Hill Mine, Toole County, Utah.
Green botryoidal conichalcite on matrix, puttied in a Perky box with printed label.
#MM137b ... $7.95
Copper & Epidote - Copper Harbor, Michigan. Puttied in a small paper box.
#M294 ... $2.50
Diopside on Calcite - Franklin, NJ. One or two euhedral diopside micro xtls (translucent, green) amid several subhedral ones. A very small piece of matrix, typical of micromount size but Unmounted.
#M302 ... $1.50
Giniite - greenish-black xtls. Rare. Sandamab Quarry, Usakos, Karibib, Namibia. Small piece of matrix with giniite and another mineral. Puttied in the lid of a plastic box.
#M244 ... $6.00
Nine Mile Pluton,
Marathon County, Wisconsin
Shiny black micro xtls and massive goethite on matrix. Puttied in a micromount box lid which has been painted black to reduce glare.
#M210 ... $4.00
Hauyne - Niedermendig, Eifel, Germany. Sky blue anhedral xtln. grains in matrix.
Hauyne, like sodalite, doesn't usually form well-defined xtls; it appears as vitreous blobs.
Photo shows a representative specimen but not the exact one you are buying. We have a couple of these available.
Hematite on calcite. Buckwheat Pit, Franklin, NJ. A tiny cluster of botryoidal hematite, surrounded by a ring of hematite having a radial appearance. Matrix is tiny, typical of a micromount, but is Unmounted.
#M299 ... $1.50
Hematite, Magnetite / Franklinite, & Calcite. Buckwheat Mine, Franklin, NJ. Small crystals (with parting) in calcite on top of some massive magnetite-hematite-franklinite ore. A couple of small, complete xtls and several partials. Some have a multicolored iridescent coating (copper secondaries, perhaps), and also a whitish secondary coating that could be smithsonite.
Complicating identifications in this assemblage is the fact that magnetite and franklinite can occur exsolved within one another; likewise hematite.
TN size specimen, puttied in a Jousi-style Euro box (nice label on underside).
#M300 ... $8.00
Hematite, Magnetite / Franklinite, & Calcite. Buckwheat Mine, Franklin, NJ. This assemblage, like M300, would have been mined from the Buckwheat Pit mine.
Mostly massive, metallic-gray hematite; there is one nice, complex micro xtl on this specimen (along right-hand edge; 30x recommended). Lg. TN size matrix. Puttied in white paper box with a nice label.
#M301 ... $4.50
Kinoite with Apophyllite, Ruizite, and Gilalite
Gila County, AZ
Rich blue kinoite on matrix, with minor amounts of gilalite (green) and ruizite (reddish-tan). Puttied in a Finn-style micromineral box. The kinoite micro xtls are numerous on this one.
#M219 ... $7.00
Important: a note about mineral identifications
Microminerals and Micromounts, M thru Z
Minerals: Teaching. Reference, & Assortments
Minerals: Various, A thru L
Minerals: Various, M thru Z
CR Scientific Catalog
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