Copper - Central mine, Michigan

Description: A miniature of native copper from a world-renowned copper mining district, the Keweenaw Peninsula, Michigan. This particular specimen is from the Central mine in Michigan, and it has noticeable partial crystal faces and a growth pattern. Do note this specimen has been cleaned. The Central mine is located on a fissure deposit and consists of 4 shafts and two adits. The Central Mining Company was organized in 1854 and had the distinction of being the first mine to turn a profit in its first year of operation. Work continued until 1898, when all operations ceased. It was sold to the Frontenac Copper Company in 1905 and later absorbed by Calumet & Hecla. In its 44 years of operation, the Central produced 51 million pounds (23134 metric tons) of refined copper and a large amount of silver. This mine is a favorite of collectors for the wide variety of minerals that can be found. Dimensions are 4.3x1.4x3.1cm - 1¾x½x1¼in. Please note the centimeter cube and inch bar for scale. Weight in grams and ounces: 35.5g - 1.25oz. From the Central mine, Michigan. The previous collection this specimen was in is #136, Dr. Allan Johnson. #136 is the museum's Collection Sale number previously offered in the museum shop. >>> We do COMBINED SHIPPING for multiple items. To request an invoice from us that combines shipping ALWAYS, click the Add to cart button on eBay to add items until you are done. DO NOT PROCEED to checkout; instead, click the Request Total from Seller button. <<< === There is an instructional video on how to request combined shipping is here https://www.youtube.com/watch?v=FvDe7Fg7R4Q === >>>> We Buy Collections <<<< DISCLAIMER: Every reasonable effort was made to identify the mineral species noted in each specimen accurately. The occasional label from previous collection(s) may misidentify some species, and the current title and description here reflect the latest mineral species identification. Buyers should also be aware of what type of lighting to view the specimens under. This can result in perceived differences of color and contrast due to color and contrast shifting under various kinds of lights available.All photographs were taken with a Nikon D5300 digital camera with a Nikon DX AF-S 18-55mm lens attached with a UV filter. Lighting was done with a pair of OSRAM 8.5 watt LED A19 5000K 800 lumens bulbs in brushed aluminum reflectors. The photographs were processed on a color-calibrated flat panel monitor. Do note the Imperial measurement conversion is the nearest equivalent to the listed metric measurement. --- All photographs appearing on this listing or any other Franklin Mineral Museum listing are the property of the Franklin Mineral Museum. Photographs can be used strictly for personal use only. Otherwise, the photographs posted here are protected by U.S. Copyright Laws. They are not to be downloaded or reproduced for public use or distribution in any way without the written permission of the Franklin Mineral Museum. ---

Price: 40 USD

Location: Franklin, New Jersey

End Time: 2024-12-17T05:30:14.000Z

Shipping Cost: 8 USD