Ruby

Mineral Group: Corundum Group

Key Properties

Property Value
Mohs Hardness 9.0 (9)
Typical Size 0.25-20 carats (commercial: 0.5-5 carats; fine quality stones over 10 carats are extremely rare)
Typical Price Range $100-100,000+ per carat (commercial: $500-5,000; pigeon's blood Burmese $10,000-100,000+)
Rarity Level Unique Geological
Availability Level Collectors Market
Availability Driver Limited Investment
Investment Appropriateness Blue Chip Investment Gems

Detailed Descriptions

Rarity Description: Gem-quality corundum with chromium — superb stones are limited to a handful of classic localities.

Availability Description: High-quality stones trade mainly through established dealers and auction houses; market availability fluctuates by origin and size.

Investment Description: Burmese pigeon's blood and Mozambique unheated rubies are premier investment gems; strong international auction market; proven appreciation over decades; high liquidity for fine specimens.

Colors

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Investment Ranking Calculation

The composite score of 80.0 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%): 100 points

Formula: (85 × 0.25) + (85 × 0.25) + (100 × 0.25) + (0 × 0.125) + (100 × 0.125) = 80.0

VERY BULLISH
80.0

Score Components

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