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

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Antimony #16026
none, None
Chemical Formula: Sb
Size: Sm Cabinet
2-4mm crystals of nearly pure synthetic Antimony.
Overall: 7.5 x 2 x 0.3 cm
Available
$25.00
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Apatite #MMI26
Darrah Pech, Kunar Province, Afghanistan
Mountain Minerals International specimen
Chemical Formula: Ca5(PO4)3(OH,F,Cl)
Size: Miniature
Nice soft purple Apatite (probably fluorapatite) with large tabular crystals to 1.5cm. Obviously the mineral, reacting to the lights, changed colors as the it was rotated about its axes. The true color is well represented in the upper right photo.
Overall: 4 x 3 x 2 cm
Available
$250.00
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Apatite #DC26963
Keyes Mica Mine, Grafton Co., New Hampshire, United States
Cooke Collection
Chemical Formula: Ca5(PO4)3(OH,F,Cl)
Size: Sm Cabinet
Blue hexagonal Apatite crystals to 5mm embedded in Quartz, Feldspar, and Muscovite matrix.
Overall: 5.5 x 4 x 4 cm
Available
$45.00
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Apophyllite #GJ26840
Fall Creek, Oregon, United States
Jungles Collection
Chemical Formula: KCa4(Si4O10)2F•8(H2O)
Size: Miniature
Lustrous colorless Apophyllite crystals to 6mm in clusters on matrix.
Overall: 4.5 x 3 x 4 cm
Available
$30.00
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Apophyllite #DP19597
Boghill Quarry, Glengormley, Belfast, Northern Ireland, United Kingdom
Polak Collection
Chemical Formula: KCa4(Si4O10)2F•8(H2O)
Size: Miniature
Elongate vug to 2cm long filled with pale pink Apophyllite.
Overall: 3.5 x 3 x 3 cm
Available
$25.00
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Apuanite #23757
Buca della Vena Mine, Apuan Alps, Lucca, Tuscany, Italy
Type Locality
Chemical Formula: Fe++Fe+++4Sb+++4O12S
Size: Miniature
Black grains to 3mm of Versiliaite and silvery-black crystals to 1mm of Apaunite. The two are difficult to distinguish, but based on some research the Apuanite are the well formed metallic crystals and the Versiliaite is the dull black subhedral grains. Ex. D. Garske specimen.
Overall: 3.5 x 1.5 x 2 cm
Available
$75.00
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