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Bi-color ametrine is a transparent variety of quartz that exhibits both the purple hues of amethyst and the yellow-orange tones of citrine within the same crystal. This unique combination of colors makes it a visually striking and highly prized gemstone. The two colors are typically separated into distinct zones within the crystal structure, and the balance between the amethyst and citrine shades is a key factor in its value.

Here's a more detailed description:

• Appearance:

  Ametrine displays a captivating blend of purple and yellow-orange, often with a clear distinction between the two colors. The intensity of the colors can vary, with fine ametrine exhibiting medium-dark to strong purple and vivid to strong orange-yellow.

• Composition:

  Ametrine is a bicolored variety of quartz, meaning it is primarily composed of silicon dioxide (SiO2).

• Formation:

  The distinct color zoning in ametrine arises from variations in iron oxidation and temperature exposure during the crystal's formation.

• Rarity and Origin:

  While ametrine is a naturally occurring gemstone, it is relatively rare, with the most significant source being Bolivia.

• Cutting and Value:

  Ametrine is often cut into rectangular shapes to showcase the color separation or into blended designs that create a mix of yellow, purple, and peach tones. The clarity, color intensity, and balance between the two colors significantly influence its value.