Showcase  11
December 19, 2018

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  Datolite

Superior mine
Ontonagon County
Michigan

Choice medium-size datolite with pleasing pink interior setoff by epidote and dark veining.
4.3 x 3.5 x 1.4cm


TM 21-1077

SOLD
     
     
     
     
     
     
     
     
     
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  Copper crystals

Northwestern mine #3 shaft
Keweenaw County
Michigan

A branch of copper crystals emerging from an analcime vug with the largest crystal very elongated. 'til now, just about every copper from the Northwestern came from the #4 shaft - this is the first we have had from the #3 shaft.
5.6 x 4.2 x 2.3cm

TM 19-833


$75.00
     
     
     
     
     
     
     
     
     
     
     
     
  TM 19-833
     
     
     
     
     
     
     
     
     
     
     
     
     
  TM 19-833
     
     
     
     
     
     
     
     
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  Datolite

Keweenaw Point
Keweenaw County
Michigan

From the tip of the Keweenaw, an excellent medium-size datolite with a deep butter-yellow color. The internal fracture does not come to the surface and is not nearly as noticeable as in the lighted digital photos. Rare this size.
4.8 x 3.5 x 1.7cm

TM 21-1078


SOLD
     
     
     
     
     
     
     
     
     
     
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  Silver

Cliff mine
Keweenaw County
Michigan

Very fine miniature-size silver from the oldest fissure mine in the Keweenaw. Silver on all sides.
3.7 x 3.0 x 1.8cm

TM 45-216


$85.00
     
     
     
     
     
     
     
     
     
     
     
  TM 45-216
     
     
     
     
     
     
     
     
     
     
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  Prehnite

Nebraska mine
Ontonagon County
Michigan

Outstanding vug of prehnite crystals with copper crystals and balls of pumpellyite from the Butler Lode in the Nebraska mine.

10.0 x 5.8 x 4.2cm

TM 75-523

SOLD
     
     
     
     
     
     
     
     
     
     
     
     
  TM 75-523
     
     
     
     
     
     
     
     
     
     
     
     
  TM 75-523
     
     
     
     
     
     
     
     
     
     
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  Copper crystals

Northwestern mine #3 shaft
Keweenaw County
Michigan

Superb example of cubic copper crystals. The large cube at one end is hoppered. See photo.

2.8 x 1.3 x 0.9cm

TM 19-834

SOLD
     
     
     
  TM 19-834
     
     
     
     
     
     
     
     
     
     
     
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