Lapis lazuli vs Sapphire
比较Lapis lazuli与Sapphire的硬度、价格与光学特性。
| 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 | 否 | 是 |
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
选择Lapis lazuli，当您追求更高品质与独特色彩。适合日常佩戴与订婚珠宝。
When to choose Sapphire
选择Sapphire，当您寻求独特的光学特性与稀缺性。适合日常佩戴与特殊场合。
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.