Serpentine

The book delves into the characteristics of serpentine, a mineral known for its hydrous magnesium silicate composition and typically dull green color, often resembling a serpent's skin. It explores its variations, including the presence of iron that can impart red or brown hues, and highlights the significance of precious serpentine, which is translucent and rich in oil-green color. Additionally, the text discusses its formation through the alteration of other magnesian minerals, emphasizing its prevalence in large masses.