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Home MOHS Gemological Hardness Pencil
Close-up of ten different mineral tips on Mohs gemological hardness testing pencils arranged in a row.
Ten Mohs hardness testing pencils arranged inside a padded blue storage presentation box, viewed from the left.
Right-angled view of the open blue presentation box containing a full set of Mohs gemological hardness pencils.
A set of ten numbered Mohs gemological hardness testing picks resting inside their open blue storage box case.
Detailed macro view of five distinct mineral hardness testing points mounted on black metal pencil bodies.
Four Mohs hardness pencils remaining in the left side of an open blue slots box with empty slots on the right.
Padded blue storage box showing a partial set of Mohs hardness pencils from an alternate perspective.
A hand performing a scratch hardness test on a raw green gemstone using a number nine Mohs hardness pencil.
Close-up of ten different mineral tips on Mohs gemological hardness testing pencils arranged in a row.
Ten Mohs hardness testing pencils arranged inside a padded blue storage presentation box, viewed from the left.
Right-angled view of the open blue presentation box containing a full set of Mohs gemological hardness pencils.
A set of ten numbered Mohs gemological hardness testing picks resting inside their open blue storage box case.
Detailed macro view of five distinct mineral hardness testing points mounted on black metal pencil bodies.
Four Mohs hardness pencils remaining in the left side of an open blue slots box with empty slots on the right.
Padded blue storage box showing a partial set of Mohs hardness pencils from an alternate perspective.
A hand performing a scratch hardness test on a raw green gemstone using a number nine Mohs hardness pencil.
PresidiumSKU: TTIA0038

MOHS Gemological Hardness Pencil

$100.55 / Sold out
Shipping calculated at checkout.
Type: Mohs 5–9 (5-Piece Set)
Close-up of ten different mineral tips on Mohs gemological hardness testing pencils arranged in a row.
MOHS Gemological Hardness Pencil
$100.55 /
Type: Mohs 5–9 (5-Piece Set)

Hardness Pencil is used for scratching the rough gemstones. If there are scratches, the gemstone hardness is lower than that hardness marked on the pens.

It includes: 1, Talc 2, Gypsum 3, Calcite 4, Fluorite 5, Apatite 6, Feldspar 7, Quartz 8, Topaz 9, Corundum 10, Diamond

 
 
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Related categories
Professional Presidium gem testing devices, including Gem Tester II and OTi, with loose gems on a bright grey surface.Gem Tester jeweler-desk-flatlay-digital-caliper-presidium-gem-tester-magnifying-loupe-diamond-ring-and-earrings-for-appraisalTools & Supplies

The professional mineralogical standard for determining the scratch resistance of rough stones, jade, and gems. Accurately identifying raw geological specimens requires analyzing their physical properties before any cutting or faceting begins. The Mohs Gemological Hardness Pencil Kit provides a definitive, calibrated method for mechanical hardness verification. Each pen features a premium mineral tip securely inlaid into a lightweight, knurled metal handle. By performing controlled scratch tests against standard reference minerals, gemologists, appraisers, and lapidary artists can rapidly narrow down an unknown specimen’s identity and assess its structural durability.

Advantages

  • Authentic Mineral Inlays: The tips are permanently inlaid with true mineral crystals representing the exact hardness values of the Mohs scale, ensuring strict compliance with classical gemological testing standards.

  • Ergonomic Anodized Bodies: The sleek, black metal handles measure 104mm x 6mm and feature a cross-hatched knurled grip pattern. This gives the technician precise, slip-free tactile control when applying minimal pressure.

  • Streamlined Portability: Every set arrives housed in a protective, padded storage case. Weighing only 205g total with the packaging, the kit is optimized for travel to remote mining sites, trade shows, and estate liquidations.

Jadeite vs. Nephrite vs. Simulants: The definitive field method to separate authentic Jadeite (Mohs 6.5–7) and Nephrite (Mohs 6–6.5) from lower-hardness lookalikes like Serpentine (Mohs 3–5) or Soapstone.

Rough Mineral Parcel Auditing: Essential for lapidary artists and wholesale rough dealers to instantly screen bulk geological parcels at trade shows or mining sites before purchasing.

Industrial & Ceramic Scratch Diagnostics: Highly effective for non-jewelry applications, such as verifying the relative scratch resistance of technical glassware, architectural quartz slabs, and advanced ceramic coatings.

Free Global Shipping
We process orders within 1-3 business days. Estimated standard international delivery is 6-12 business days.

14-Day Returns
We have a 14-day return policy. Items must be unused, with all original accessories, and in original packaging.

For full details, please refer to our Shipping and Refund policies at the bottom of the page.


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