Natural Ametrine 39.50 ct – Pear Cut, Heat Treated

Natural ametrine, 39.50 carats, pear faceted cut, heat treated, purple and golden-yellow bi-color gemstone

Natural Ametrine 39.50 ct – Pear Cut, Heat Treated

Name: Natural Ametrine 39.50 ct – Pear Cut, Heat Treated
Brand: SOSNA Gems & Jewellery
Price: 8553.00 CZK
Availability: InStock

8.553,00 CZK

Gemstone Specification

Carat Weight 39.5

Dimensions 24.80 × 17.40 × 14.80 mm

Color Bicolor - Purple / Yellow

Clarity Eye Clean

Shape Pear

Treatment Heated

Certification Basic Seller's Certificate

This 39.50 carat natural ametrine showcases a gentle blend of lavender-purple and golden-yellow hues, characteristic of this unique bi-color quartz variety. Cut in a large pear-shaped faceted design measuring 24.8 × 17.4 × 14.8 mm, the gemstone displays bright internal reflections and a smooth gradient between its two natural color zones.
The stone has undergone standard heat treatment, commonly used to enhance the clarity and saturation of its dual tones.
With its substantial size and eye-catching color transition, this ametrine is well suited for statement jewelry pieces such as pendants or bold custom designs.
A distinctive gemstone offering both visual interest and versatility in contemporary jewelry.

Natural Ametrine 39.50 ct – Pear Cut, Heat Treated

8.553,00 CZK

From gemstone to jewelry

This example illustrates one possible way a gemstone may be developed into a bespoke piece. Final design is always defined individually, based on the stone and its natural character.

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Gemological overview

Technical and gemological information about this gemstone variety.

Gemological profile

Ametrine is a naturally occurring bicolor variety of quartz, combining purple amethyst and golden citrine within a single crystal. It is valued for its distinctive color zoning, which creates a clear visual contrast between violet and yellow tones, making each stone inherently unique.
Chemically composed of silicon dioxide (SiO₂), ametrine belongs to the silicate mineral group and crystallizes in the trigonal crystal system, like other quartz varieties. In gem-quality specimens, it typically displays a vitreous luster and transparent clarity.
The refractive index of ametrine generally ranges from 1.544 to 1.553, resulting in a soft, balanced brilliance rather than strong dispersion. Natural ametrine is found almost exclusively in Bolivia, where geological conditions allow the coexistence of both color zones within a single crystal.

Durability & suitability

Ametrine is a naturally occurring bicolor variety of quartz, combining purple amethyst and golden citrine within a single crystal. It is valued for its distinctive color zoning, which creates a clear visual contrast between violet and yellow tones, making each stone inherently unique.
Chemically composed of silicon dioxide (SiO₂), ametrine belongs to the silicate mineral group and crystallizes in the trigonal crystal system, like other quartz varieties. In gem-quality specimens, it typically displays a vitreous luster and transparent clarity.
The refractive index of ametrine generally ranges from 1.544 to 1.553, resulting in a soft, balanced brilliance rather than strong dispersion. Natural ametrine is found almost exclusively in Bolivia, where geological conditions allow the coexistence of both color zones within a single crystal.

Treatments & authenticity

With a hardness of 7 on the Mohs scale, ametrine offers good durability suitable for everyday jewelry when properly set and worn with standard care. It performs reliably in a variety of designs, particularly in pendants, earrings, and rings with protective settings.
Due to its characteristic color zoning, ametrine is often cut to emphasize the contrast between amethyst and citrine areas, making orientation and setting especially important. Its combination of durability, visual interest, and size availability makes it well suited for expressive, statement-oriented jewelry designs as well as distinctive everyday pieces.

Our approach to gemstones

We focus primarily on natural, untreated gemstones, valued for their authenticity and inherent beauty.
Any treatments or enhancements are always clearly disclosed, allowing our clients to make informed decisions based on transparent gemological standards.

Sosna Gems is not a licensed financial advisor. Gemstones are collectibles, not securities. Past performance is not indicative of future results. Legal & risk disclosure .