Native Copper (26g)
This copper specimen is in its natural, dendritic formation, exactly how it looked when extracted from the Earth.
Copper is a chemical element with the symbol Cu (from Latin: cuprum) and an atomic number of 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement.
Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c oxidase. In molluscs and crustaceans, copper is a constituent of the blood pigment hemocyanin, replaced by the iron-complexed hemoglobin in fish and other vertebrates. In humans, copper is found mainly in the liver, muscle, and bone.
The adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight.
There was not an explanation card with the sample like there are for Matter box items. These cards are always nice to keep with the items especially since items on the website change constantly. The bigger reason for the reduction of stars on this purchase, however, was the shredded paper packaging. The paper stuck in the dendritic formations and I, despite being extremely careful, ended up breaking pieces off of the sample trying to get it out of the box. I believe some bubble wrap would have been a better packaging material for this particular item.