Explains in non-technical terms how to use the Chelsea filter and synthetic emerald filter to identify diamonds and colored gems, and how to separate natural gems from imitations, treated gemstones...więcej »
Integrates the classic foundations of pastoral care with current approaches to spiritual care, particularly in acute or long-term care facilities and rehabilitation centers. Experts in the field of...więcej »
Explains in non-technical terms how to use the refractometer to identify diamonds and colored gems, and how to separate natural gems from imitations, treated gemstones, synthetics, and look-alikes....więcej »