Amethyst
Mineral Group: Quartz Group
Key Properties
| Property | Value |
|---|---|
| Mohs Hardness | 7.0 (7) |
| Typical Size | 1-100+ carats (commercial: 3-30 carats; very large clean stones commonly available) |
| Typical Price Range | $5-50 per carat (commercial: $10-30; deep purple Siberian $30-50) |
| Rarity Level | Abundant Minerals |
| Availability Level | Consistently Available |
| Availability Driver | Consistent Deposits |
| Investment Appropriateness | Non-Investment Gems |
Detailed Descriptions
Rarity Description: Purple quartz variety; abundant in geodes and veins worldwide, making it one of the most common gemstones.
Availability Description: Extremely common in all market segments; available everywhere from craft stores to fine jewelers in all sizes.
Investment Description: Extremely abundant worldwide; very large supply eliminates scarcity premium; no investment potential regardless of quality; purely decorative and affordable jewelry use.
Colors
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Investment Ranking Calculation
The composite score of 16.88 is calculated using a weighted formula:
- Geological Rarity (25%): 35 points
- Market Availability (25%): 10 points
- Investment Appropriateness (25%): 5 points
- Hardness (12.5%): 25 points
- Price Range (12.5%): 10 points
Formula: (35 × 0.25) + (10 × 0.25) + (5 × 0.25) + (25 × 0.125) + (10 × 0.125) = 16.88
VERY BEARISH
16.88
Score Components
Geo rarity
35
Mkt availability
10
Invest Appr
5
hardness
25
price
10