These unusual copper species specimens are one of the more surprising finds of the last few years, in that blister copper itself is fairly rare worldwide and we had not seen anything like this from China before (presumably, because it is a rich and easy ore, and is simply smelted at economic mines). Superb chalcopyrite specimens are actually quite more rare than many other copper minerals, and this particular style, nicknamed by old British miners as Blister Copper, is among the most seldom seen as a collectible quality specimen. This bright, brassy cluster came to us in a small 'COVID-era' find in China in early 2020. A few pockets came out in 2019-2020, and we got much of them through visits in 2019, and then through a runner while I was stuck in America during COVID. This would be one of the better examples in the size class, out of several dozen altogether we had obtained.