Watermelon Tourmaline

Mineral Group: Tourmaline Group

Key Properties

Property Value
Mohs Hardness 7.25 (7-7.5)
Typical Size 0.5-20 carats (commercial: 1-10 carats; typically cut as slices)
Typical Price Range $50-500 per carat (commercial: $100-300; strong color contrast valued)
Rarity Level Limited Occurrence
Availability Level Limited Supply
Availability Driver Limited Deposits
Investment Appropriateness Fashion/Trend Gems

Detailed Descriptions

Rarity Description: Tourmaline with pink center and green rim; natural color zoning is attractive but less common than single-color varieties.

Availability Description: Popular among collectors and designers; available through specialty dealers and gem shows, typically as sliced cross-sections.

Investment Description: Novelty bicolor tourmaline with collector appeal; primarily designer jewelry market; limited investment potential; valued for aesthetic uniqueness rather than appreciation.

Colors

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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