Rare mixed precious metal cut three pieces from the same slab that broke during testing with two hand polished sides, natural edges. White metal and gold ore with sulfides and platinum types, silver and gold combining with pl types and trace copper light amber yellow to clear and white quartz. No magnetic properties detected, gold pockets with the electrum effect. Very rare ore from deep within the Blue Ridge Mountains, 1800s Ore Knob Copper Mine, Ashe County, North Carolina. A historical registered long closed mine shaft. Photos show filings from the gold spot areas and the silver sulfide area with combined gold. platinum's, copper trace element silver testing acids, muriatic and nitric combines. Note that the platinum results, photos are marked as to which acid is being seen after testing period. The silver/white metal remains in all three acid tests while some gold remains in 14k and in the platinum acid. (Nitric and muriatic combined testing acids used 12K, 14K, 18K, 24K, platinum and silver). Rare quartz and sulfide mixed precious metal ore mix ore hand polished display slab ore with three pieces filing test process, natural edges that are uncut or polished faces with no coatings, so the raw silver will tarnish and need occasional cleaning. The was a little amount of melting but not much, swab tests also indicate gold intermingling in the silver and platinum sulfide areas. Some blue indication indicate copper. Large amount of the precious metals in this ore that weighs just under 3 lbs. altogether. Measurements are from the longest points of each piece. One: 5-1/8-inches x 4-1/2 inches, number two: 3-3/8 inches x 3-1/2 inches, number three: 2-3/4 inches x 1-1/2 inches, all three have the same thickness of 3/4 inch. Listing is foe all in the pieces in the photos Historical early United States mining specimen that is recently cut from a very large piece ore rock that was brought to the surface in the early 1800s. Measurements are from the longest points with an even thickness. History of the mine can be found online, incorporated mid 1800s but the history goes further back of the area to early settlement days. You may find that some of listings also contain relics from the area while they last. All ore you see on my store are from the earlier days of this deep earth mine with onsite smelting samples and other relics.