Spinel

Mineral Group: Spinel Group

Key Properties

Property Value
Mohs Hardness 8.0 (8)
Typical Size 0.5-20 carats (commercial: 1-10 carats; larger stones available)
Typical Price Range $100-2,000+ per carat (commercial: $200-800; color dependent)
Rarity Level Limited Occurrence
Availability Level Limited Supply
Availability Driver Limited Deposits
Investment Appropriateness Emerging Investment Gems

Pricing

Typical Price
$150.00
per carat
Listing Price
$275.84
per carat
Sold Price
$45.68
per carat
Discount Level
0.3
vs typical

Price Calculator

Estimate Type Total Value Price per Carat
Typical Cost - -
Likely Listed Cost - -
Likely Sold Cost - -

Detailed Descriptions

Rarity Description: Magnesium aluminum oxide mineral. Generic spinel entry for name matching priority. Historically confused with ruby; now recognized as valuable in its own right.

Availability Description: Available through gem dealers; fine colors from Burma and Tanzania command premiums.

Investment Description: Growing recognition; fine red and pink spinels have investment potential; durable and beautiful.

MODERATELY BULLISH
59.38

Score Components

Geo rarity
65
Mkt availability
65
Invest Appr
75
hardness
0
price
65

Buy This Gem

Buy on Gem Rock Auctions Buy on Best In Gems

Investment Ranking Calculation

The composite score of 59.38 is calculated using a weighted formula:

  • Geological Rarity (25%): 65 points
  • Market Availability (25%): 65 points
  • Investment Appropriateness (25%): 75 points
  • Hardness (12.5%): 0 points
  • Price Range (12.5%): 65 points

Formula: (65 × 0.25) + (65 × 0.25) + (75 × 0.25) + (0 × 0.125) + (65 × 0.125) = 59.38

Current Listings

Please sign in to view current listings.

Other gems in the Spinel Group:

My Holdings of this gem

You do not have any holdings of this gem type.