Check the listing for details. Michigan Gold Mine Core Sample with Trace Gold 1 Split Cores 3.6 ounces E. Condition: New. Listed at 25.00 USD. Michigan Gold Mine Core Sample with Trace Gold 1 Split Cores 3.6 ounces E This is 100% Michigan earth mined from Ropes GOLD Mine in Michigan. These core samples were drilled and then split. Some were used to assay the gold content and others were given to investors. These were from 1934.NOTE: It took many tons of the best quartz ore to produce a single ounce of gold. These core samples are of the serpentine strata that had the least amount of gold. Consequently there may be such a small trace of gold that it may be undetectable.The following paragraph is from:GOLD IN MICHIGAN REFERENCES AND PHOTOCOPIES OF SELECTED OUT-OF-PRINT PUBLICATIONS OF THE MICHIGAN DNR GEOLOGICAL SURVEY DIVISION Open-File Report MGSD OFR GOLD 80-1, 1980 Ropes Gold Mine. - Ore formation, said to. have a width of from 30 to 50 feet, described as talcose slates in which ore occurs in lenticular form generally running transversely across the formation. Lenses consist of narrow bands of quartz and slate. Minerals associated with gold are galena, pyrite, chalcopyrite, chalcocite (?). Country rock also described as serpentine and diorite. Shafts described as sunk in serpentine, one shaft to a depth of 850 feet. Lode developed for 400 to 500 feet along vein, and described as wider and more regular with depth and The Pictures describe the specimens as these are the actual specimen that you will receive. It will be carefully packed and shipped First Class Mail for fast safe arrival to you. Free Shipping. Thank You. Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.