| Property | Moldavite | Obsidian |
|---|---|---|
| Category | Semi-Precious Gems | Semi-Precious Gems |
| Primary Color | various | black |
| Mohs Hardness | 5.5 | 5.0–5.5 |
| Specific Gravity | 2.32 | 2.35 |
| Refractive Index | 1.48 | 1.45 |
| Crystal System | Amorphous | Amorphous |
| Luster | Vitreous | Vitreous |
| Chemical Formula | — | — |
| Price Tier | Budget (< $50/ct) | Budget (< $50/ct) |
| Daily Wear | いいえ | いいえ |
Key Differences
- ◆ {'gem_a': '5.5', 'gem_b': '5.0', 'property': 'Hardness (Mohs)'}
- ◆ {'gem_a': 'Amorphous', 'gem_b': 'Amorphous', 'property': 'Crystal System'}
- ◆ {'gem_a': '2.32', 'gem_b': '2.35', 'property': 'Specific Gravity'}
- ◆ {'gem_a': '1.48', 'gem_b': '1.45', 'property': 'Refractive Index'}
- ◆ {'gem_a': 'Vitreous', 'gem_b': 'Vitreous', 'property': 'Luster'}
- ◆ {'gem_a': 'budget', 'gem_b': 'budget', 'property': 'Price Range'}
- ◆ {'gem_a': 'No', 'gem_b': 'No', 'property': 'Daily Wear'}
When to choose Moldavite
傷つきにくさとより高い輝きを求める方にはモルダバイトがお勧めです。コレクターピースや特別な場面のジュエリーに向いています。
When to choose Obsidian
独特な色彩と個性を求める方にはオブシディアンがお勧めです。コレクターピースに最適です。
Frequently Asked Questions
Which is harder, Moldavite or Obsidian?
Moldavite is harder at 5.5 on the Mohs scale, compared to Obsidian at 5.0-5.5. This makes Moldavite more resistant to scratching. Moldavite requires more careful handling and is not ideal for daily wear, while obsidian requires more careful handling and is not ideal for daily wear.
Is Moldavite more expensive than Obsidian?
Moldavite and Obsidian are in a similar price range, both classified as budget-friendly (under $50/ct). Moldavite typically ranges budget-friendly (under $50/ct), while Obsidian ranges budget-friendly (under $50/ct).
Should I choose Moldavite or Obsidian for an engagement ring?
Neither Moldavite nor Obsidian is ideal for an engagement ring worn daily. Moldavite (5.5 Mohs) is the more durable of the two, while Obsidian (5.0-5.5 Mohs) is softer. If you choose either, consider a protective setting like a bezel.
How can I tell Moldavite and Obsidian apart?
There are several visual cues: Moldavite typically appears various while Obsidian is black. A gemologist can confirm identification using refractive index testing.
Why do Moldavite and Obsidian look similar?
Moldavite and Obsidian look similar because both can show overlapping colors — Moldavite is various and Obsidian is black.