Andradite

Mineral Group: Garnet Group

Key Properties

Property Value
Mohs Hardness 7.0 (6.5-7.5)
Typical Size 0.5-10 carats (commercial: 1-5 carats; most varieties in smaller sizes)
Typical Price Range $50-500 per carat (commercial: $100-300; most varieties collector-oriented)
Rarity Level Limited Occurrence
Availability Level Limited Supply
Availability Driver Limited Deposits
Investment Appropriateness Fashion/Trend Gems

Detailed Descriptions

Rarity Description: Calcium-iron garnet; most varieties are uncommon with demantoid being the most valued.

Availability Description: Most varieties are collector-oriented; demantoid is the primary jewelry variety and trades through specialist channels.

Investment Description: Investment potential concentrated in demantoid variety; most other andradites are collector-oriented with limited markets; demantoid should be evaluated separately.

Colors

Buy This Gem

Buy on Gem Rock Auctions Buy on Best In Gems

Investment Ranking Calculation

The composite score of 47.5 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%): 45 points

Formula: (65 × 0.25) + (65 × 0.25) + (25 × 0.25) + (25 × 0.125) + (45 × 0.125) = 47.5

NEUTRAL
47.5

Score Components

Geo rarity
65
Mkt availability
65
Invest Appr
25
hardness
25
price
45