Standard diamond scribing scratch tool – accurate, long-lasting scribing tool provides a narrower scribe line to improve your diamond test.
Corundum-Tip Diamond Scratch Pens & The Mohs Hardness Scale
When it comes to testing the hardness of diamonds and minerals, the Mohs Hardness Scale is one of the most widely used methods. In the diamond industry, corundum-tip diamond scratch pens serve as essential tools for determining the authenticity and hardness of stones. But how do they work, and why are they important? Let’s dive into the science behind these testing tools and their role in the Diamond Industry.
What Is the Mohs Hardness Scale?
Developed by German mineralogist Friedrich Mohs in 1812, the Mohs Hardness Scale ranks minerals from 1 (softest) to 10 (hardest) based on their ability to resist scratching. Each mineral on the scale can scratch those with a lower ranking and can be scratched by those with a higher ranking.
Mohs Hardness Scale Chart
| Hardness Level | Mineral Example | Common Use |
|---|---|---|
| 1 | Talc | Baby powder |
| 2 | Gypsum | Plaster, chalk |
| 3 | Calcite | Limestone, cement |
| 4 | Fluorite | Industrial flux |
| 5 | Apatite | Tooth enamel |
| 6 | Orthoclase Feldspar | Ceramics |
| 7 | Quartz | Glass, sand |
| 8 | Topaz | Jewelry |
| 9 | Corundum (Ruby & Sapphire) | Industrial abrasives, gemstones |
| 10 | Diamond | Cutting tools, jewelry |
Diamonds rank at 10, making them the hardest natural substance known. Corundum (ranked 9) is the next hardest and is often used in testing tools like diamond scratch pens.
What Is a Corundum-Tip Diamond Scratch Pen?
A corundum-tip diamond scratch pen is a specialized hardness testing tool used by diamond dealers, geologists, and gemologists to verify a diamond’s hardness. It consists of a corundum tip, which can scratch softer materials but cannot scratch a real diamond.
How Does a Corundum Scratch Pen Work?
✅ Step 1: Identify the stone to be tested.
✅ Step 2: Use the corundum-tip pen to apply gentle pressure on a smooth part of the stone.
✅ Step 3: If the stone is scratched, it is softer than corundum (below 9 on Mohs scale).
✅ Step 4: If no scratch occurs, it could be a diamond (Mohs 10) or another extremely hard material.
Why Use a Corundum-Tip Diamond Scratch Pen?
🔹 Quick & Easy Hardness Testing – Helps distinguish diamonds from softer imitations and fakes.
🔹 Reliable & Portable – A must-have tool for diamond traders and jewelers.
The Limitations of Scratch Testing
While scratch pens can provide a quick hardness test, they should be used alongside other verification methods such as:
🔹 Diamond testers (thermal or electrical conductivity testers).
🔹 UV light and fluorescence tests.
Want to Learn More About Diamond Testing?
Understanding the Mohs hardness scale and diamond testing techniques is crucial for anyone in the diamond industry. That’s why we offer a Rough Diamond Evaluation Online Course, where you’ll learn:
✅ Professional diamond grading techniques.
✅ How to differentiate real diamonds from imitations.
✅ Essential tools used in the trade.
✅ How to assess value based on hardness, clarity, and color.
Introducing the Hustle M7X & M8X Diamond Kits
For serious diamond buyers, our Hustle M7X and M8X Diamond Kits are designed to give you the ultimate edge in diamond evaluation.
💎 Hustle M7X Kit – Ideal for beginners and traders looking for essential diamond testing tools. Includes:
✔ Corundum-tip diamond scratch pen
✔ Diamond loupe 18mm (10x magnification)
✔ UV Penlight Torch for fluorescence testing
✔ Digital Scale for carat measurement (100ct / 200g)
✔ Titanium Diamond Prong
💎 Hustle M8X Kit – The pro-level kit for advanced diamond evaluation. Includes:
✔ Everything in the M7X Kit
✔ Advanced diamond tester plus (thermal & electrical conductivity)
✔ D1069 Diamond Grading Lamp
These kits are perfect for diamond traders, jewelers, and anyone starting in the diamond industry.
Order Your Corundum-Tip Diamond Scratch Pen Today!
Ensure accuracy in diamond testing with our Corundum-Tip Diamond Scratch Pen – a must-have tool for diamond traders, jewelers, and diamond enthusiasts.
💎 Price: R599 each
🚚 Shipping: R180 (Nationwide)
📦 Total: R779
🔥 Limited Stock Available! Secure yours now.
📲 Order Now via WhatsApp –079 969 9580
