Understanding Gemstone Hardness and Durability
Why some gemstones are perfect for everyday rings while others belong in earrings and pendants.
The Mohs Scale
The Mohs Hardness Scale ranks minerals from 1 (softest) to 10 (hardest). For jewelry, this determines how well a stone resists scratches in daily wear.
Common Gemstones Ranked
| Gemstone | Mohs Hardness | Suitable For |
|---|---|---|
| Diamond | 10 | Everything — rings, bracelets, daily wear |
| Sapphire / Ruby | 9 | Engagement rings, everyday jewelry |
| Emerald | 7.5–8 | Rings with protective settings |
| Aquamarine | 7.5–8 | Rings, pendants, earrings |
| Tourmaline | 7–7.5 | Pendants, earrings, occasional rings |
| Opal | 5.5–6.5 | Earrings, pendants, brooches only |
| Pearl | 2.5–4.5 | Earrings, necklaces (avoid rings) |
Hardness vs. Toughness
These are different properties:
- Hardness = resistance to scratching
- Toughness = resistance to breaking
Jade has moderate hardness (6–7) but is one of the toughest gemstones. A diamond is the hardest but can chip along its cleavage planes if struck at the right angle.
Practical Recommendations
For Engagement Rings
Since engagement rings are worn daily, choose stones with a hardness of 8 or above:
- Diamond (10) — the classic choice
- Sapphire (9) — increasingly popular, stunning colors
- Ruby (9) — bold and romantic
For Earrings and Pendants
Softer stones work beautifully because they experience less contact:
- Opals, pearls, turquoise, and moonstone are all excellent choices
- These stones let you explore unique colors and effects
Protecting Softer Stones
If you love a softer gemstone in a ring:
- Choose a bezel setting (metal surrounds the stone)
- Avoid wearing during physical activity
- Store separately from harder stones
- Remove before washing hands
Our Gemstone Promise
Every CBVH piece includes a gemstone identification card detailing the stone's type, origin, hardness, and care instructions.
