This stunning 22-carat bi-colour ametrine features an elegant emerald cut that beautifully showcases its unique blend of purple and orange hues. Expertly faceted, the stone exhibits exceptional clarity with an eye-clean appearance, making it a captivating choice for high-end jewelry.Sourced from Africa, this natural gemstone is completely untreated and unheated, preserving its raw and authentic beauty. Measuring 18.9 x 13 x 12 mm, it is offered as a single loose stone—perfect for collectors or custom jewelry designers. Ametrine is also recognized as a birthstone for August, adding personal significance to its natural charm.

1. How can I verify that a cut Ametrine is natural and not synthetic or treated?

ametrine is clearly described as "not heated, not treated" and eye-clean, which is a strong indicator of authenticity. Additionally, the fact that the stone is untreated and naturally bi-colour—showing both purple and orange hues—suggests that it likely originates from a genuine source, possibly even the famous Bolivian Anahí mine

2. What factors determine the quality and price of a cut Ametrine?

• Color Balance: The description states it has bi-colour purple and orange, which is ideal for ametrine. A strong contrast between these colors (as your stone likely has) increases its desirability.
  
• Cut Quality: The emerald cut is a popular choice for ametrine, as it emphasizes the division between the two colors, maximizing visual appeal. Its proportions (18.9 × 13 × 12 mm) suggest a well-balanced and visually striking piece.
  
• Clarity: Being eye-clean means there are no visible inclusions to the naked eye, placing this stone in a higher quality bracket.
  
• Carat Weight: At 22 carats, it is a substantial gemstone—perfect for collectors or a custom luxury piece. Larger sizes in clean condition are rarer and more valuable.