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Micro-minerals and micromounts: M thru Z- generally require magnification. Matrix is usually TN (thumbnail) or smaller.
For an explanation of abbreviations used, please see our guide to mineral sizes.
Makatite - Aris Quarry, Rehoboth, Namibia. Rare. White acicular xtls on matrix. Associations (may) include aegrine, albite, villiaumite, tuperssuatsiaite.
#M289 ... $7.00
Monazite-(Ce) or Monazite-(La) with Pyrite, etc. - Siglo Veinte Mine, Llallagua, Bolivia. Matrix size is about 1 3/8" across max. dimension. Micro xtls of monazite are translucent, pink in incandescent light or sunlight and colorless in fluorescent light. This color change seems to be associated with Ce / La minerals.
#M295 ... $7.00
Rutile - Buckwheat Dump, Franklin, New Jersey - extremely tiny needles of rutile with pyrite, on / in a small bit of dolomite matrix. Typical size and habit for this locality (Franklin rutiles are tiny). 30x or higher required.
We have a few of these available and will upload them as soon as we can.
Sanidine - blocky xtls. Wausau Complex, Marathon County, Wisconsin. Not actually "micro" xtls, these can be viewed without any magnification. Appears to have a "sandy" overgrowth of some other mineral. This piece may or may not also have micros of other [unidentified] species.
The altered granites of the Wausau Complex are home to numerous mineral species, including rare-earths such as monazite and cheralite.
Overall specimen size is 1 7/8" across max. dimension.
#M288 ... $4.99
Unnamed new Gold analog of Gallite - Polar Ural, Russia. This is the only specimen of this mineral that we have. It is also the only one we have ever seen. This new Au mineral is, in all likelihood, very rare.
Matrix is about 1 cm across.
Ex-Rutgers Univ.
#M293 ... $45.00
Important: a note about mineral identifications
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Microminerals and Micromounts, A thru L
Minerals: Teaching. Reference, & Assortments
Minerals: Various, A thru L
Minerals: Various, M thru Z
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