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 »
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 »
What is the connection between an abandoned vehicle and the mysterious and gruesome death of a shepherd in an isolated barn 100 years ago? Will PC Gary Olson's interest in eventually acquiring the ...więcej »