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= Fluorescent Specimen
   =  Radioactive Specimen

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Panasqueira Mine, Couto Miniero de Panasqueira, Castelo Branco District, Portugal
Absolutely beautiful, divergent spray composed of more than a dozen terminated, very lustrous black Ferberite xls. ranging from 3/4” tall, up to 2” tall, without rock matrix. The largest crystal, on the left side of the specimen, measures 1 1/2” tall and 3/4” across. The base and portions of the back of the specimen are coated a thin layer composed of many hundreds of light tan colored, disc shaped intergrown Siderite xls., accompanied by a minor amount of xlized Arsenopyrite.  Former collection of Dr. Robert Byers.

Overall specimen size:  2 1/4” tall, 2 7/8”  wide, and 1” thick at the base
Order Item:  MI-2000
Price:  $275.



Pyrite – Navajun, Logrono Region, La Rioja Province, Spain –  The largest Pyrite cube is 1 1/8” X 1 1/8”.  The host rock (matrix) is marl, which has been analyzed as more than 50% clay (type not specified in the analysis) and at least 15% calcium carbonate, i.e., either Calcite or Aragonite.

Order Item No. MI-1270A
Specimen size:  4 ¾ X 3 5/8 X  2 ¼”
Price:  $80 

Order Item No. MI-1270B
Specimen size: 3 7/8 X 2 7/8 X  2 3/8”
Price:  $65 


Quartz – Amethyst – State of Minas Gerais, Southeast Region, Brazil – Several nice display specimens available, priced according to the specimen size and size of crystals.  All are sections from the interiors of very large, geode-like formations.
Order Item No. MI-1267A
Specimen size:  4 5/8 X 2 ¼ X 1 ¼”
Price:  $30.
Quartz “Herkimer Diamond” – Middleville, Herkimer County, New York – Two large, magnificent water clear xls. are in a group, no matrix.
Order Item No. MI-1272
Specimen size:  2 ½ X 1 ½ X 1”
Price:  $145


Quartz – Amethyst – Artigas, Uruguay – Both specimens are sections of large, geode-like formations.  From this locality, these very special specimens have knobby projections of matrix, protruding into the hollow openings in the geodes, and these knobby projections are covered with Amethyst crystals.  Item B. only has small white Calcite xls. associated.

Order Item No. MI-1278A
Specimen size:  3 ½ X 2 ½ X 2 ¼”
Price:  $110.

Skookumchuck Dam, Bucoda, Thurston County, Washington

A write-up covering this amazing USA locality for Mesolite by Rudy Tschernich, entitled "Zeolites from Skookumchuck Dam, Washington” appeared in the “Mineralogical Record” magazine, 3(1), p.30-34 (1974).  The specimen offered here is from the original find, purchased in 1969, and is from the collection of Frances and Jean Marshall of San Francisco, CA,  #F-27.  The Marshall’s original file card, with a hand drawn sketch of the specimen, will be sent with the specimen.  The individual terminated “matchstick” Mesolite xls. are up to 2 1/4” in length.  Micro white Laumontite xls. are associated.  No matrix.  The specimen was temporarily mounted to a clear Plexiglas display base with Elmer’s white glue in 1969, and could be removed, if desired, by soaking the specimen in water.

Specimen size:  2 1/4” tall, 1 1/8” wide at the top of the spray, and 3/8” wide at the base.
Order item:  MI-1997
Price:  $45.00

Actinolite with Talc – Wrightwood, San Bernardino Co., CA – Pale green to light silver-gray color Talc with dark green crystalline Actinolite, no matrix.

Order Item No. MI-1276B
Specimen size:  7 ¼ X 4 X 2”
Muscovite – Stak Nala, Gilgit Division, Pakistan – Large cleavage of light smoky gray color Muscovite, no matrix or associated minerals.
Order Item No. MI-1259
Specimen size:  6 X 4 ¼” across, X approx. 5 mm thick
Price:  $45

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