I think I mentioned before that my great grandfather was a miner in Nevada in the late 19th century. He mined two forms of copper ore, green malachite and blue azurite, copper carbonates with formulas Cu2CO3(OH)2 and Cu3(CO3)2(OH)2 respectively. For some reason, our family collects rocks. These were gathered on the mountain where my great grandfather lived and where my grandfather and his two siblings were born and raised. We have recently thrown away a lot of rocks that were in my mom’s basement but we kept a few that were particularly nice. Cathy put some in this bowl and they are outside our front door, where the bowl has filled with rain water, which I think makes it especially nice.