How to Polish Gems of 4-6 Hardness: Survey Results


pectolite - 4-6 hardness
Pectolites can range in hardness from 4.5 to 5. Compact specimens can even reach 6. Found in the Dominican Republic, compact blue pectolites known as Larimars can take a very high polish. “Larimar Pendant” by Deidre Woollard. Licensed under CC By 2.0.

Editor’s Note: Some years ago, the International Gem Society (IGS) conducted a survey of members’ gemstone polishing techniques. Here, you’ll find the results for polishing gems in the 4-6 hardness range. Stones in this range include species such as feldspar, fluorite, and apatiteWhether you’re just starting to learn the art of gem cutting or just looking for a new way to tackle a problematic gem material, we hope these results provide some useful suggestions.

For more information about the survey or to find results for more gemstones, click here.

Polishing Techniques for Gems of 4-6 Hardness

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