Danburite
Mineral Group: Sorosilicate Group
Key Properties
| Property | Value |
|---|---|
| Mohs Hardness | 7.25 (7-7.5) |
| Typical Size | Unknown |
| Typical Price Range | $30-200 per carat (commercial: $50-120; collector appeal, good brilliance) |
| Rarity Level | Limited Occurrence |
| Availability Level | Limited Supply |
| Availability Driver | Limited Deposits |
| Investment Appropriateness | Fashion/Trend Gems |
Detailed Descriptions
Rarity Description: Calcium borosilicate; gem-quality transparent crystals are uncommon though deposits exist in several locations.
Availability Description: Available through specialty gem dealers; appreciated by collectors for clarity and brilliance but not widely known in mainstream markets.
Investment Description: Good brilliance but limited market recognition; collector-oriented; moderate appreciation for finest specimens; small niche market.
Colors
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Investment Ranking Calculation
The composite score of 45.0 is calculated using a weighted formula:
- Geological Rarity (25%): 65 points
- Market Availability (25%): 65 points
- Investment Appropriateness (25%): 25 points
- Hardness (12.5%): 25 points
- Price Range (12.5%): 25 points
Formula: (65 × 0.25) + (65 × 0.25) + (25 × 0.25) + (25 × 0.125) + (25 × 0.125) = 45.0
NEUTRAL
45.0
Score Components
Geo rarity
65
Mkt availability
65
Invest Appr
25
hardness
25
price
25