Sphene (Titanite)

Mineral Group: Titanite Group

Key Properties

Property Value
Mohs Hardness 5.25 (5-5.5)
Typical Size 0.5-20 carats (commercial: 1-8 carats; larger clean stones are uncommon)
Typical Price Range $100-1,000+ per carat (commercial: $200-600; high dispersion, collector market)
Rarity Level Unique Geological
Availability Level Collectors Market
Availability Driver Limited Investment
Investment Appropriateness Unknown

Detailed Descriptions

Rarity Description: Highly refractive titanite with dispersive fire; fine faceting material is rare.

Availability Description: High-dispersion, collectable gems appear via specialist dealers and auctions; durability limits mainstream jewelry use.

Investment Description: No description available.

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Investment Ranking Calculation

The composite score of 51.25 is calculated using a weighted formula:

  • Geological Rarity (25%): 85 points
  • Market Availability (25%): 85 points
  • Investment Appropriateness (25%): 0 points
  • Hardness (12.5%): 5 points
  • Price Range (12.5%): 65 points

Formula: (85 × 0.25) + (85 × 0.25) + (0 × 0.25) + (5 × 0.125) + (65 × 0.125) = 51.25

MODERATELY BULLISH
51.25

Score Components

Geo rarity
85
Mkt availability
85
Invest Appr
0
hardness
5
price
65