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Chalcocite With Native Silver

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QRI652574

Chalcocite With Native Silver

Description Tabs

Description
Locality: 
Clark Mine, Copper Harbor, Keweenaw County, Michigan, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 2.7 × 1.5 cm
Largest Crystal: 
0.70cm
Weight: 
9.00gr
Description

Rare specimen of chalcocite from the Clark mine. Perfect jet black crystals are formed on the typical epidote and calcite rich matrix. The crystals are well formed, with numerous faces, and one of them even shows a partially hoppered face. Associated, a dark grey native silver wire on the very top of the specimen.
Of exceptionally good quality for the Clark mine, this is a very interesting paragenesis as well. The specimen comes on an acrylic plynth with a small tack drop, which can be easily removed. The specimen comes from a Swiss collection we have recently acquired, and it is most certainly dated to the 70s.

Mineral Data
What's on the rock

Chalcocite

Formula: 
Cu2S
Strunz: 
2.BA.05
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0

Silver

Formula: 
Ag
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

Shipping within 15 days after payment received, unless specified/agreed otherwise.

NOTE:
Due to a very busy holiday schedule, specimens paid after Dec 14 will be shipped by Januar 7. For any information or combined shipping please contact me.

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