Exotic Gems, Volume 4 Silver & Precious Metal Materials and how diamonds were assessed

and how diamonds were assessed and valued

With a natural 5500K daylight light source and a mix of LED + CFL lamps

Mains operated

Install the plus (+) side up toward the cap (see figures a and b on the left)

Exotic Gems, Volume 4 Silver & Precious Metal Materials and how diamonds were assessedExotic Gems, Volume 4: How to Identify, Evaluate and Select Jade and Abalone Pearls Explains with color photos the price factors and identifying traits of jade and abalone pearls. Jade is shown shown not only loose but also in jewelry, in the rough and as beads. Fun facts, historical anecdotes, geographic sources, gem treatment information, cutting sequences, advanced identification methods and tips on gem care are included along with diagrams and