Exceptional Gemstones

Gemstones rated 46–50 on the Otzera 50 — our highest classification, reserved for a very small number of stones that show a rare convergence of beauty, quality and collector importance.

Every score is judged relative to the stone’s own species. How the Otzera 50 works
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  • 9.04 ct Mexican fire opal triangular modified brilliant, face-up view

    9.04 ct Mexican Fire Opal — Triangular Modified Brilliant

    9.04 ct Mexican Fire Opal — Triangular Modified Brilliant
    $12,200.00
  • 9.10 ct Mexican fire opal cushion modified brilliant, face-up view

    9.10 ct Mexican Fire Opal — Cushion Modified Brilliant

    9.10 ct Mexican Fire Opal — Cushion Modified Brilliant
    $12,285.00
  • 5.11 ct Oregon sunstone triangular modified brilliant, face-up view

    5.11 ct Oregon Sunstone — Triangular Modified Brilliant

    5.11 ct Oregon Sunstone — Triangular Modified Brilliant
    $7,665.00
  • 9.65 ct Tanzanian tanzanite cushion mixed cut, vivid blue-violet face-up view.

    9.65 ct Vivid Blue-Violet Tanzanite — PGS Report

    9.65 ct Vivid Blue-Violet Tanzanite — PGS Report
    $14,475.00