Hardness Pencil

The Hardness Pencil series provides precise Mohs scale testing tools to determine the hardness of gemstones and minerals.

Whether you are a gemologist, jeweler, appraiser, collector, or hobbyist, these pencils help you:

• Measure gemstone hardness accurately

• Identify minerals and distinguish similar-looking stones

• Assess durability and scratch resistance

• Assist in gemstone verification and quality control

• Complement other gemological tools like loupes, scales, and testers

Hardness testing is critical in gemology for classifying stones and preventing damage during cutting, setting, or handling.