Aquamarine vs Sapphire
アクアマリンとサファイアはよく似た色合いの人気宝石です。アクアマリンはより手頃な価格帯で、サファイアは硬度と輝きに優れています。
| Property | Aquamarine | Sapphire |
|---|---|---|
| Category | Semi-Precious Gems | Precious Gems |
| Primary Color | blue | blue |
| Mohs Hardness | 7.5–8.0 | 9.0 |
| Specific Gravity | 2.66 | 3.95 |
| Refractive Index | 1.57 | 1.762 |
| Crystal System | Hexagonal | Trigonal |
| Luster | — | rutile |
| Chemical Formula | — | — |
| Price Tier | Moderate ($50-500/ct) | Investment ($5,000+/ct) |
| Daily Wear | はい | はい |
Key Differences
- ◆ {'gem_a': '7.5', 'gem_b': '9.0', 'property': 'Hardness (Mohs)'}
- ◆ {'gem_a': 'Hexagonal', 'gem_b': 'Trigonal', 'property': 'Crystal System'}
- ◆ {'gem_a': '2.66', 'gem_b': '3.95', 'property': 'Specific Gravity'}
- ◆ {'gem_a': '1.57', 'gem_b': '1.762', 'property': 'Refractive Index'}
- ◆ {'gem_a': 'N/A', 'gem_b': 'rutile', 'property': 'Luster'}
- ◆ {'gem_a': 'moderate', 'gem_b': 'investment', 'property': 'Price Range'}
- ◆ {'gem_a': 'Yes', 'gem_b': 'Yes', 'property': 'Daily Wear'}
When to choose Aquamarine
より手頃な価格を求める方や3月の誕生石としての意味を重視する方にはアクアマリンがお勧めです。
When to choose Sapphire
傷つきにくさ・高い輝き・希少性・高品質を求める方にサファイアがお勧めです。婚約指輪や日常使いに最適です。
Frequently Asked Questions
Which is harder, Aquamarine or Sapphire?
Sapphire is harder at 9.0 on the Mohs scale, compared to Aquamarine at 7.5-8.0. This makes Sapphire more resistant to scratching. Sapphire is suitable for daily wear, while aquamarine is suitable for daily wear.
Is Aquamarine more expensive than Sapphire?
No, Aquamarine is generally less expensive. Aquamarine is classified as moderately priced ($50-500/ct) at moderately priced ($50-500/ct), while Sapphire is investment-grade ($5,000+/ct) at investment-grade ($5,000+/ct).
Should I choose Aquamarine or Sapphire for an engagement ring?
Both Aquamarine and Sapphire can work for engagement rings since both are suitable for daily wear. Sapphire has a slight edge with a durability rating of 10/10 with 9.0 Mohs hardness, while Aquamarine comes in at 7.5-8.0 Mohs. Your choice may come down to color preference and budget.
How can I tell Aquamarine and Sapphire apart?
There are several visual cues: both appear blue, but often in different saturations; Sapphire (RI 1.762-1.788) shows more brilliance than Aquamarine (RI 1.57-1.592); they have different crystal systems — Aquamarine is Hexagonal and Sapphire is Trigonal. A gemologist can confirm identification using refractive index testing.
Why do Aquamarine and Sapphire look similar?
Aquamarine and Sapphire look similar because both gems display blue hues.