Nelvine

Nelvine is a variety of feldspar called albite. It is soft and fragile, but easily cut with crude tools. It is found in large amounts in older rocks. Nelvine is occasionally called "pigeon stone" due to its white, cream, fawn, or brownish pink color. It exhibits a beautiful celestial-blue flash of iridescence, or play of reflected color, known as peristerism. A typical specimen has a base value of 10gp.