Ametrine

Mineral Group: Quartz Group

Key Properties

Property Value
Mohs Hardness 7.0 (7)
Typical Size 1-50 carats (commercial: 3-25 carats; large clean stones available from Bolivia)
Typical Price Range $20-100 per carat (commercial: $30-60; strong color contrast $60-100)
Rarity Level Limited Occurrence
Availability Level Readily Available
Availability Driver Limited Deposits
Investment Appropriateness Fashion/Trend Gems

Detailed Descriptions

Rarity Description: Bicolor quartz showing both amethyst and citrine zones; natural occurrences are limited primarily to Bolivia.

Availability Description: Primarily from Bolivia's Anahi mine; regularly available through gem dealers and jewelry retailers specializing in unique stones.

Investment Description: Limited primarily to Bolivia; moderate collector interest for strong bicolor specimens; fashion-driven market with some appreciation potential for finest material.

Colors

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Investment Ranking Calculation

The composite score of 37.5 is calculated using a weighted formula:

  • Geological Rarity (25%): 65 points
  • Market Availability (25%): 35 points
  • Investment Appropriateness (25%): 25 points
  • Hardness (12.5%): 25 points
  • Price Range (12.5%): 25 points

Formula: (65 × 0.25) + (35 × 0.25) + (25 × 0.25) + (25 × 0.125) + (25 × 0.125) = 37.5

BEARISH
37.5

Score Components

Geo rarity
65
Mkt availability
35
Invest Appr
25
hardness
25
price
25