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Copper & Calcite

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MNT596410

Copper & Calcite

ex Dr. F. Krantz, Bonn, GER, ex?
Classic Locality

Description Tabs

Description
Locality: 
Lake Superior, Keweenaw County, Michigan, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 4.5 × 4 cm
Description

19th century classic from Michigan: volcanic rock matrix hosts copper included calcite and some free copper aggregates. Historic example specimen with some damage due to the age and storage. Most probably from the Quincy or the Phoenix Mine. Glued on label pre-Krantz, no Krantz label.

 

Mineral Data
What's on the rock

Copper

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

Terms & Conditions

Thank you for your interest in my offers! Payment is possible via Paypal, bank transfer or cash if you pick up the item(s) personally. Bank data will be provided after settling the auction/transaction(s) if needed.

In case you are not happy with a specimen, you may send it back within 4 weeks. After receipt, i will refund the price minus shipping costs. Please inform me before sending an item back. If you have any questions (or maybe complaints) please feel free to contact me.

Best regards Roger