Natural Untreated Ametrine Loose Gemstone – Emerald Cut Bi-Color Quartz, 7.98 Carat Earth Mined Collector Gem for Custom Jewelry, 17x9mm
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This natural ametrine displays one of the gem world’s most fascinating color combinations — golden citrine and royal purple amethyst naturally blended within a single crystal. Expertly cut into a refined emerald shape, this 7.98 carat loose gemstone showcases dramatic color zoning with exceptional clarity and crisp faceting that catches light beautifully from every angle. Measuring approximately 17x9mm, its elongated silhouette makes it especially desirable for custom rings, pendants, or collector pieces that deserve a bold center stone.
Untreated and earth-mined, this ametrine offers the kind of natural beauty collectors and jewelry lovers increasingly seek — authentic color without enhancement. Its striking bi-color appearance gives it an artistic, almost sunset-like glow that changes subtly under different lighting. Rare in larger calibrated sizes with strong color separation, this gemstone is ideal for anyone looking to create a one-of-a-kind fine jewelry piece with personality, warmth, and undeniable presence.
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FAQ
What are treatments?
Natural gemstones are mined from the earth and come in a range of qualities. The quality of a gem is based on their color, cut, clarity and carat weight. Treatments are used to enhance earth mined gemstones to improve quality so that they can be used in jewelry.
Treatments can affect the value of a gemstone so it is important to know if your gem is treated before you buy to make sure you're getting the value you are paying for. If you're interested in learning more about treatments visit our blog here.
How do I know a gemstone is natural?
All of our gemstones are handpicked by our GIA accredited gemologist. We are happy to offer a certificate of authenticity for any gemstone purchase from NNJ Designs. We can also send a gemstone to the GIA for certification.
We primarily deal in natural gemstones, but as lab grown gems increase affordability, we offer them on rare occassion. We will always disclose if a gemstone is natural or lab created.
Can one of your designs be cast to fit my center stone?
We can cast any of our designs to perfectly fit the shape and size of your center stone! Please share the dimensions of your gem along with the design that you are interested in and we will work up a quote.