Amethyst vs Smoky Quartz
Comparing Amethyst and Smoky Quartz — two members of the same mineral family. On the Mohs scale, Amethyst rates 7.0 and Smoky Quartz rates 7.0. In terms of price, Amethyst falls in the moderately priced range and Smoky Quartz in the moderately priced range.
| Property | Amethyst | Smoky Quartz |
|---|---|---|
| Category | Semi-Precious Gems | Semi-Precious Gems |
| Primary Color | purple | various |
| Mohs Hardness | 7.0 | 7.0 |
| Specific Gravity | 2.65 | 2.65 |
| Refractive Index | 1.544 | 1.544 |
| Crystal System | Trigonal | Trigonal |
| Luster | — | — |
| Chemical Formula | — | — |
| Price Tier | Moderate ($50-500/ct) | Moderate ($50-500/ct) |
| Daily Wear | Ja | Ja |
Key Differences
- ◆ {'gem_a': '7.0', 'gem_b': '7.0', 'property': 'Hardness (Mohs)'}
- ◆ {'gem_a': 'Trigonal', 'gem_b': 'Trigonal', 'property': 'Crystal System'}
- ◆ {'gem_a': '2.65', 'gem_b': '2.65', 'property': 'Specific Gravity'}
- ◆ {'gem_a': '1.544', 'gem_b': '1.544', 'property': 'Refractive Index'}
- ◆ {'gem_a': 'N/A', 'gem_b': 'N/A', 'property': 'Luster'}
- ◆ {'gem_a': 'moderate', 'gem_b': 'moderate', 'property': 'Price Range'}
- ◆ {'gem_a': 'Yes', 'gem_b': 'Yes', 'property': 'Daily Wear'}
When to choose Amethyst
Choose Amethyst when you want comparable durability, and its significance as the modern February birthstone. It's ideal for engagement rings and everyday jewelry.
When to choose Smoky Quartz
Choose Smoky Quartz when you want comparable durability. It's ideal for engagement rings and everyday jewelry.
Frequently Asked Questions
Which is harder, Amethyst or Smoky Quartz?
Amethyst and Smoky Quartz have the same Mohs hardness of 7.0, so neither is more scratch-resistant than the other. Amethyst is suitable for daily wear, and smoky quartz is suitable for daily wear.
Is Amethyst more expensive than Smoky Quartz?
Amethyst and Smoky Quartz are in a similar price range, both classified as moderately priced ($50-500/ct). Amethyst typically ranges moderately priced ($50-500/ct), while Smoky Quartz ranges moderately priced ($50-500/ct).
Should I choose Amethyst or Smoky Quartz for an engagement ring?
Both Amethyst and Smoky Quartz can work for engagement rings since both are suitable for daily wear. Amethyst has a slight edge with a durability rating of 7/10 with 7.0 Mohs hardness, while Smoky Quartz comes in at 7.0 Mohs. Your choice may come down to color preference and budget.
How can I tell Amethyst and Smoky Quartz apart?
There are several visual cues: Amethyst typically appears purple while Smoky Quartz is various. A gemologist can confirm identification using refractive index testing.
Are Amethyst and Smoky Quartz the same mineral?
Yes, both Amethyst and Smoky Quartz belong to the unknown group mineral group. Despite being related, they differ in color, value, and sometimes durability.