| Property | Emerald | Sapphire |
|---|---|---|
| Category | Precious Gems | Precious Gems |
| Primary Color | green | blue |
| Mohs Hardness | 7.5–8.0 | 9.0 |
| Specific Gravity | 2.67 | 3.95 |
| Refractive Index | 1.565 | 1.762 |
| Crystal System | Hexagonal | Trigonal |
| Luster | — | rutile |
| Chemical Formula | — | — |
| Price Tier | Investment ($5,000+/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': '2.67', 'gem_b': '3.95', 'property': 'Specific Gravity'}
- ◆ {'gem_a': '1.565', 'gem_b': '1.762', 'property': 'Refractive Index'}
- ◆ {'gem_a': 'N/A', '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 Emerald
5月の誕生石としての意義を重視する方にはエメラルドがお勧めです。婚約指輪や日常使いにも向いています。
When to choose Sapphire
傷つきにくさとより高い輝きを求める方には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, Emerald or Sapphire?
Sapphire is harder at 9.0 on the Mohs scale, compared to Emerald at 7.5-8.0. This makes Sapphire more resistant to scratching. Sapphire is suitable for daily wear, while emerald is suitable for daily wear.
Is Emerald more expensive than Sapphire?
Emerald and Sapphire are in a similar price range, both classified as investment-grade ($5,000+/ct). Emerald typically ranges investment-grade ($5,000+/ct), while Sapphire ranges investment-grade ($5,000+/ct).
Should I choose Emerald or Sapphire for an engagement ring?
Both Emerald 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 Emerald comes in at 7.5-8.0 Mohs. Your choice may come down to color preference and budget.
How can I tell Emerald and Sapphire apart?
There are several visual cues: Emerald typically appears green while Sapphire is blue; Sapphire (RI 1.762-1.788) shows more brilliance than Emerald (RI 1.565-1.602); they have different crystal systems — Emerald is Hexagonal and Sapphire is Trigonal. A gemologist can confirm identification using refractive index testing.
Can I use Emerald instead of Sapphire as a birthstone?
Emerald is the modern May birthstone while Sapphire is the modern September birthstone. While you can certainly wear any gemstone you prefer, they represent different months. Emerald could be a stylish alternative if you prefer its appearance or price point.