If a small piece of cuprite be held in a candle flame it will melt, and color the flame emerald-green. If pulverized and heated on charcoal, or in a porcelain dish, it will first blacken, then melt, and finally be reduced to a bead of metallic copper.... Practical Mineralogy Simplified: For Mining Students, Miners and Prospectors - Pagina 29 door Jesse Perry Rowe - 1911 - 162 pagina’s Volledige weergave -
|