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✔ Simple calibration function
Useful for handling hot items
this level of sensitivity supports reliable grading
TYPE DE CUTTER: MICRO-BEVEL
About the Authors: Karen Hurrell is a freelance journalist and bestselling author of many books
Gemstones: A Complete Color Reference for Precious and Semiprecious Stones of the World Polishing ✔ Simple calibration functionThis fascinating work provides a truly stunning visual guide to the beautiful world of gemstones. It brings together a wealth of information in clearly worded text accompanied by a dazzling collection of color photographs showing gems in their natural and cut states. From subjects as diverse as identifying and collecting minerals and advanced testing, to ethical sourcing of gems, every aspect of gemstones is covered, and is presented with a wealth of