Lapis lazuli vs Sapphire
Lapis lazuli and Sapphire, both popular gemstones that share a similar color palette, differ in hardness (5.5 vs 9.0 Mohs) and price tier (budget-friendly vs investment-grade). Sapphire offers greater durability for everyday wear.
| Property | Lapis lazuli | Sapphire |
|---|---|---|
| Category | Semi-Precious Gems | Precious Gems |
| Primary Color | blue | blue |
| Mohs Hardness | 5.5 | 9.0 |
| Specific Gravity | 2.5 | 3.95 |
| Refractive Index | 1.5 | 1.762 |
| Crystal System | Isometric | Trigonal |
| Luster | Vitreous,Greasy | rutile |
| Chemical Formula | — | — |
| Price Tier | Budget (< $50/ct) | Investment ($5,000+/ct) |
| Daily Wear | Nein | Ja |
Key Differences
- ◆ {'gem_a': '5.5', 'gem_b': '9.0', 'property': 'Hardness (Mohs)'}
- ◆ {'gem_a': 'Isometric', 'gem_b': 'Trigonal', 'property': 'Crystal System'}
- ◆ {'gem_a': '2.5', 'gem_b': '3.95', 'property': 'Specific Gravity'}
- ◆ {'gem_a': '1.5', 'gem_b': '1.762', 'property': 'Refractive Index'}
- ◆ {'gem_a': 'Vitreous,Greasy', 'gem_b': 'rutile', 'property': 'Luster'}
- ◆ {'gem_a': 'budget', 'gem_b': 'investment', 'property': 'Price Range'}
- ◆ {'gem_a': 'No', 'gem_b': 'Yes', 'property': 'Daily Wear'}
When to choose Lapis lazuli
Choose Lapis lazuli when you want a more budget-friendly price point. It's ideal for collector specimens and carefully worn jewelry.
When to choose Sapphire
Choose Sapphire when you want superior hardness and scratch resistance, higher brilliance and light performance, premium quality and rarity, suitability for daily wear, and its significance as the modern September birthstone. It's ideal for engagement rings and everyday jewelry.
Frequently Asked Questions
Which is harder, Lapis lazuli or Sapphire?
Sapphire is harder at 9.0 on the Mohs scale, compared to Lapis lazuli at 5.5. This makes Sapphire more resistant to scratching. Sapphire is suitable for daily wear, while lapis lazuli requires more careful handling and is not ideal for daily wear.
Is Lapis lazuli more expensive than Sapphire?
No, Lapis lazuli is generally less expensive. Lapis lazuli is classified as budget-friendly (under $50/ct) at budget-friendly (under $50/ct), while Sapphire is investment-grade ($5,000+/ct) at investment-grade ($5,000+/ct).
Should I choose Lapis lazuli or Sapphire for an engagement ring?
For an engagement ring, Sapphire is the stronger choice with a durability rating of 10/10. At 9.0 Mohs hardness, it can withstand daily wear well. Lapis lazuli (5.5 Mohs) is softer and more prone to scratching with everyday use, making it better suited for occasional-wear jewelry.
How can I tell Lapis lazuli and Sapphire apart?
There are several visual cues: both appear blue, but often in different saturations; Lapis lazuli has a vitreous,greasy luster compared to Sapphire's rutile luster; Sapphire (RI 1.762-1.788) shows more brilliance than Lapis lazuli (RI 1.5-1.67); they have different crystal systems — Lapis lazuli is Isometric and Sapphire is Trigonal. A gemologist can confirm identification using refractive index testing.
Why do Lapis lazuli and Sapphire look similar?
Lapis lazuli and Sapphire look similar because both gems display blue hues.