Peridot (Olivine) vs Tourmaline
ペリドット（オリビン）とトルマリンはどちらも人気の緑色宝石です。ペリドットは輝きの面で優れ、トルマリンは硬度で上回ります。
| Property | Peridot (Olivine) | Tourmaline |
|---|---|---|
| Category | Semi-Precious Gems | Semi-Precious Gems |
| Primary Color | green | various |
| Mohs Hardness | 6.5–7.0 | 7.0–7.5 |
| Specific Gravity | 3.27 | 2.85 |
| Refractive Index | 1.65 | 1.614 |
| Crystal System | Orthorhombic | Trigonal |
| Luster | Vitreous,Greasy | Vitreous |
| Chemical Formula | — | — |
| Price Tier | Moderate ($50-500/ct) | Moderate ($50-500/ct) |
| Daily Wear | いいえ | はい |
Key Differences
- ◆ {'gem_a': '6.5', 'gem_b': '7.0', 'property': 'Hardness (Mohs)'}
- ◆ {'gem_a': 'Orthorhombic', 'gem_b': 'Trigonal', 'property': 'Crystal System'}
- ◆ {'gem_a': '3.27', 'gem_b': '2.85', 'property': 'Specific Gravity'}
- ◆ {'gem_a': '1.65', 'gem_b': '1.614', 'property': 'Refractive Index'}
- ◆ {'gem_a': 'Vitreous,Greasy', 'gem_b': 'Vitreous', 'property': 'Luster'}
- ◆ {'gem_a': 'moderate', 'gem_b': 'moderate', 'property': 'Price Range'}
- ◆ {'gem_a': 'No', 'gem_b': 'Yes', 'property': 'Daily Wear'}
When to choose Peridot (Olivine)
より高い輝きや8月の誕生石としての意味を重視する方にはペリドット（オリビン）がお勧めです。
When to choose Tourmaline
傷つきにくさと品質の高さを重視する方にはトルマリンがお勧めです。婚約指輪や日常使いに最適です。
Frequently Asked Questions
Which is harder, Peridot (Olivine) or Tourmaline?
Tourmaline is harder at 7.0-7.5 on the Mohs scale, compared to Peridot (Olivine) at 6.5-7.0. This makes Tourmaline more resistant to scratching. Tourmaline is suitable for daily wear, while peridot (olivine) requires more careful handling and is not ideal for daily wear.
Is Peridot (Olivine) more expensive than Tourmaline?
Peridot (Olivine) and Tourmaline are in a similar price range, both classified as moderately priced ($50-500/ct). Peridot (Olivine) typically ranges moderately priced ($50-500/ct), while Tourmaline ranges moderately priced ($50-500/ct).
Should I choose Peridot (Olivine) or Tourmaline for an engagement ring?
For an engagement ring, Tourmaline is the stronger choice with a durability rating of 7/10. At 7.0-7.5 Mohs hardness, it can withstand daily wear well. Peridot (Olivine) (6.5-7.0 Mohs) is softer and more prone to scratching with everyday use, making it better suited for occasional-wear jewelry.
How can I tell Peridot (Olivine) and Tourmaline apart?
There are several visual cues: Peridot (Olivine) typically appears green while Tourmaline is various; Peridot (Olivine) has a vitreous,greasy luster compared to Tourmaline's vitreous luster; they have different crystal systems — Peridot (Olivine) is Orthorhombic and Tourmaline is Trigonal. A gemologist can confirm identification using refractive index testing.
Why do Peridot (Olivine) and Tourmaline look similar?
Peridot (Olivine) and Tourmaline look similar because both can show overlapping colors — Peridot (Olivine) is green and Tourmaline is various.