| Property | Ruby | Spinel |
|---|---|---|
| Category | Precious Gems | Semi-Precious Gems |
| Primary Color | red | various |
| Mohs Hardness | 9.0 | 8.0 |
| Specific Gravity | 3.97 | 3.54 |
| Refractive Index | 1.762 | 1.71 |
| Crystal System | Trigonal | Isometric |
| Luster | — | Vitreous |
| Chemical Formula | — | — |
| Price Tier | Investment ($5,000+/ct) | Fine ($500-5,000/ct) |
| Daily Wear | 是 | 是 |
Key Differences
- ◆ {'gem_a': '9.0', 'gem_b': '8.0', 'property': 'Hardness (Mohs)'}
- ◆ {'gem_a': 'Trigonal', 'gem_b': 'Isometric', 'property': 'Crystal System'}
- ◆ {'gem_a': '3.97', 'gem_b': '3.54', 'property': 'Specific Gravity'}
- ◆ {'gem_a': '1.762', 'gem_b': '1.71', 'property': 'Refractive Index'}
- ◆ {'gem_a': 'N/A', 'gem_b': 'Vitreous', 'property': 'Luster'}
- ◆ {'gem_a': 'investment', 'gem_b': 'fine', 'property': 'Price Range'}
- ◆ {'gem_a': 'Yes', 'gem_b': 'Yes', 'property': 'Daily Wear'}
When to choose Ruby
当您追求更高硬度与抗划伤性、更强光学亮度、顶级品质与稀缺性，以及现代七月生辰石意义时，请选择红宝石。非常适合订婚戒指与日常佩戴。
When to choose Spinel
当您希望价格更为实惠时，请选择尖晶石。非常适合订婚戒指与日常珠宝。
Frequently Asked Questions
Which is harder, Ruby or Spinel?
Ruby is harder at 9.0 on the Mohs scale, compared to Spinel at 8.0. This makes Ruby more resistant to scratching. Ruby is suitable for daily wear, while spinel is suitable for daily wear.
Is Ruby more expensive than Spinel?
Yes, Ruby is generally more expensive. Ruby is classified as investment-grade ($5,000+/ct) with prices around investment-grade ($5,000+/ct), while Spinel is fine/premium ($500-5,000/ct) at fine/premium ($500-5,000/ct).
Should I choose Ruby or Spinel for an engagement ring?
Both Ruby and Spinel can work for engagement rings since both are suitable for daily wear. Ruby has a slight edge with a durability rating of 10/10 with 9.0 Mohs hardness, while Spinel comes in at 8.0 Mohs. Your choice may come down to color preference and budget.
How can I tell Ruby and Spinel apart?
There are several visual cues: Ruby typically appears red while Spinel is various; Ruby (RI 1.762-1.778) shows more brilliance than Spinel (RI 1.71-1.735); they have different crystal systems — Ruby is Trigonal and Spinel is Isometric. A gemologist can confirm identification using refractive index testing.
Why do Ruby and Spinel look similar?
Ruby and Spinel look similar because both can show overlapping colors — Ruby is red and Spinel is various.