Dakota Matrix Minerals – Crystal and mineral specimens such as gold for the earth science student.

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Brochantite #26492
Liptovska, Dubrava, Slovakia
Chemical Formula: Cu4(SO4)(OH)6
Size: Miniature
Nice lustrous deep green Brochantite crystals to 1mm and microcrystalline coatings covering matrix.
Overall: 4 x 3 x 3.5 cm
Sold
$35.00
More information on Brochantite on Webmineral.com or MinDat.org


Brookite #25872
Plan-du-Lac, , Isere, France
Micro crystals of Brookite to 1 mm.
Chemical Formula: TiO2
Size: Miniature
Deep red, translucent micro crystals. Good locality specimn.
Overall: 3.5 x 2.5 x 1.5 cm
Available
$35.00
More information on Brookite on Webmineral.com or MinDat.org
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Bukovskyite #DP21890
Kank, Kutna Hora, Bohemia, Czech Republic
Polak Collection Type Locality
Chemical Formula: Fe+++2(AsO4)(SO4)(OH)•7(H2O)
Size: Capsule
Light brown pieces to 5mm of powdery Bukovskyite in capsule.
Available
$35.00
More information on Bukovskyite on Webmineral.com or MinDat.org
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Calcite #DC24343
Krumbach, Tirol, Austria
Cooke Collection
Chemical Formula: CaCO3
Size: Miniature
"Dog-tooth" Calcite crystals to 2.5cm showing brown phantoms, which give it the brown color. Nice gropup of crystals, one crystal on the backside is broken off.
Overall: 5 x 4.5 x 3 cm
Available
$35.00
More information on Calcite on Webmineral.com or MinDat.org
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Calcite #25863
Megla Pefka Mine, Laurion dist., Attika, Greece
Chemical Formula: CaCO3
Size: Miniature
Two generations of Calcite, the first is a druse of fine pointed colorless crystals and the second is larger curved colorless crystals to 3mm.
Overall: 4 x 2.5 x 3 cm
Available
$30.00
More information on Calcite on Webmineral.com or MinDat.org
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Calcite - globular #GJ6789
Montaldo di' Castro, Italy
Chemical Formula: CaCO3
Size: Sm Cabinet
Yellowish hemispherical aggregates of Calcite to 1cm.
Overall: 6 x 3 x 3 cm
Sold
$30.00
More information on Calcite - globular on Webmineral.com or MinDat.org

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