Diamond vs Sapphire
Comparing Diamond and Sapphire — two birthstone gems often compared by jewelry buyers. On the Mohs scale, Diamond rates 10.0 and Sapphire rates 9.0. In terms of price, Diamond falls in the investment-grade range and Sapphire in the investment-grade range.
| Property | Diamond | Sapphire |
|---|---|---|
| Category | Precious Gems | Precious Gems |
| Primary Color | various | blue |
| Mohs Hardness | 10.0 | 9.0 |
| Specific Gravity | 3.5 | 3.95 |
| Refractive Index | 2.417 | 1.762 |
| Crystal System | Isometric | Trigonal |
| Luster | Adamantine,Greasy | rutile |
| Chemical Formula | — | — |
| Price Tier | Investment ($5,000+/ct) | Investment ($5,000+/ct) |
| Daily Wear | ใช่ | ใช่ |
Key Differences
- ◆ {'gem_a': '10.0', 'gem_b': '9.0', 'property': 'Hardness (Mohs)'}
- ◆ {'gem_a': 'Isometric', 'gem_b': 'Trigonal', 'property': 'Crystal System'}
- ◆ {'gem_a': '3.5', 'gem_b': '3.95', 'property': 'Specific Gravity'}
- ◆ {'gem_a': '2.417', 'gem_b': '1.762', 'property': 'Refractive Index'}
- ◆ {'gem_a': 'Adamantine,Greasy', 'gem_b': 'rutile', 'property': 'Luster'}
- ◆ {'gem_a': 'investment', 'gem_b': 'investment', 'property': 'Price Range'}
- ◆ {'gem_a': 'Yes', 'gem_b': 'Yes', 'property': 'Daily Wear'}
When to choose Diamond
Choose Diamond when you want superior hardness and scratch resistance, higher brilliance and light performance, and its significance as the modern April birthstone. It's ideal for engagement rings and everyday jewelry.
When to choose Sapphire
Choose Sapphire when you want its significance as the modern September birthstone. It's ideal for engagement rings and everyday jewelry.
Frequently Asked Questions
Which is harder, Diamond or Sapphire?
Diamond is harder at 10.0 on the Mohs scale, compared to Sapphire at 9.0. This makes Diamond more resistant to scratching. Diamond is suitable for daily wear, while sapphire is suitable for daily wear.
Is Diamond more expensive than Sapphire?
Diamond and Sapphire are in a similar price range, both classified as investment-grade ($5,000+/ct). Diamond typically ranges investment-grade ($5,000+/ct), while Sapphire ranges investment-grade ($5,000+/ct).
Should I choose Diamond or Sapphire for an engagement ring?
Both Diamond and Sapphire can work for engagement rings since both are suitable for daily wear. Diamond has a slight edge with a durability rating of 10/10 with 10.0 Mohs hardness, while Sapphire comes in at 9.0 Mohs. Your choice may come down to color preference and budget.
How can I tell Diamond and Sapphire apart?
There are several visual cues: Diamond typically appears various while Sapphire is blue; Diamond has a adamantine,greasy luster compared to Sapphire's rutile luster; Diamond (RI 2.417-2.419) shows more brilliance than Sapphire (RI 1.762-1.788); they have different crystal systems — Diamond is Isometric and Sapphire is Trigonal. A gemologist can confirm identification using refractive index testing.
Can I use Diamond instead of Sapphire as a birthstone?
Diamond is the modern April birthstone while Sapphire is the modern September birthstone. While you can certainly wear any gemstone you prefer, they represent different months. Diamond could be a stylish alternative if you prefer its appearance or price point.