Sapphire

Mineral Group: Corundum Group

Key Properties

Property Value
Mohs Hardness 9.0 (9)
Typical Size 0.5-50+ carats (commercial: 1-10 carats; large fine stones available but expensive)
Typical Price Range $100-20,000+ per carat (commercial: $400-3,000; Kashmir/Burma finest $5,000-20,000+)
Rarity Level Unique Geological
Availability Level Collectors Market
Availability Driver Limited Investment
Investment Appropriateness Blue Chip Investment Gems

Detailed Descriptions

Rarity Description: Variety of corundum; fine-color sapphires are mined in select regions and are prized.

Availability Description: Top-color sapphires are offered intermittently by reputable dealers and auctions; commercial grade material is more commonly found in trade channels.

Investment Description: Kashmir, Burmese, and Ceylon sapphires with no heat treatment are top-tier investments; established grading standards; strong auction presence; excellent liquidity and proven appreciation.

Colors

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Investment Ranking Calculation

The composite score of 78.12 is calculated using a weighted formula:

  • Geological Rarity (25%): 85 points
  • Market Availability (25%): 85 points
  • Investment Appropriateness (25%): 100 points
  • Hardness (12.5%): 0 points
  • Price Range (12.5%): 85 points

Formula: (85 × 0.25) + (85 × 0.25) + (100 × 0.25) + (0 × 0.125) + (85 × 0.125) = 78.12

BULLISH
78.12

Score Components

Geo rarity
85
Mkt availability
85
Invest Appr
100
hardness
0
price
85