The Mohs Hardness Scale is a system used to measure the scratch resistance of minerals, ranking them from 1 (softest) to 10 (hardest). It was developed by Friedrich Mohs, a German mineralogist, in 1812.
This scale helps determine how durable a gemstone is for everyday wear.
Mohs Hardness Scale Chart
| Hardness | Mineral | Example / Notes |
|---|---|---|
| 10 | Diamond | Hardest known natural material |
| 9.25 | Moissanite | Extremely durable, perfect for daily wear |
| 9 | Corundum (Ruby, Sapphire) | Very hard, used in fine jewelry |
| 8 | Topaz | Durable but can scratch over time |
| 7 | Quartz | Found in watches and everyday jewelry |
| 6 | Feldspar | Softer gemstones like opal |
| 5 | Apatite | Can be scratched easily |
| 4 | Fluorite | Not suitable for jewelry |
| 3 | Calcite | Scratched by a copper coin |
| 2 | Gypsum | Scratched by a fingernail |
| 1 | Talc | Softest mineral, used in talcum powder |
Why Does Mohs Hardness Matter for Jewelry?
✔ Higher Mohs rating = More durability → Less likely to scratch or lose brilliance
✔ Moissanite (9.25) is nearly as hard as diamonds (10) → Perfect for daily wear & engagement rings
✔ Avoid softer gemstones for rings → Lower-rated stones (like Opal, Pearl) are more delicate
Final Verdict
💎 Moissanite is one of the hardest and most durable gemstones, making it an excellent choice for jewelry that lasts a lifetime.