Demantoid

Mineral Group: Garnet Group

Key Properties

Property Value
Mohs Hardness 6.75 (6.5-7)
Typical Size 0.25-5 carats (commercial: 0.5-2 carats; stones over 3 carats are very rare)
Typical Price Range $1,000-10,000+ per carat (commercial: $2,000-5,000; Russian with horsetails $5,000-10,000+)
Rarity Level Unique Geological
Availability Level Collectors Market
Availability Driver Limited Deposits
Investment Appropriateness Emerging Investment Gems

Detailed Descriptions

Rarity Description: Green andradite garnet with exceptional dispersion; classic Russian deposits and newer African sources are limited.

Availability Description: Premium prices and collector demand; offered through high-end dealers and auctions; Russian stones with horsetail inclusions are particularly prized.

Investment Description: Rare green garnet with exceptional dispersion; Russian stones with horsetail inclusions highly prized; strong collector market with proven appreciation; excellent potential for investment-grade specimens.

Colors

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Investment Ranking Calculation

The composite score of 73.12 is calculated using a weighted formula:

  • Geological Rarity (25%): 85 points
  • Market Availability (25%): 85 points
  • Investment Appropriateness (25%): 75 points
  • Hardness (12.5%): 10 points
  • Price Range (12.5%): 85 points

Formula: (85 × 0.25) + (85 × 0.25) + (75 × 0.25) + (10 × 0.125) + (85 × 0.125) = 73.12

BULLISH
73.12

Score Components

Geo rarity
85
Mkt availability
85
Invest Appr
75
hardness
10
price
85