25.03Ct Natural Untreated Ametrine Loose Gemstone – Concave Cut Square Cushion 18mm Bi-Color Quartz Gem
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This extraordinary natural ametrine showcases a mesmerizing fusion of golden citrine and royal amethyst tones in a beautifully proportioned square cushion cut. Measuring an impressive 18mm and weighing 25.03 carats, this loose gemstone commands attention with its striking size, exceptional clarity, and captivating color zoning unique to fine ametrine. The precision concave cutting creates dramatic depth and brilliance, allowing light to dance through the gem with an almost liquid glow from every angle. Untreated and earth-mined, this gemstone celebrates the raw artistry of nature with no enhancements masking its beauty.
Rarely found in such a large and clean size, this ametrine is a true collector’s piece with endless design potential. Its bold dimensions make it ideal for a statement ring, heirloom pendant, or one-of-a-kind couture jewelry creation. The combination of warm and cool tones gives the stone remarkable versatility, pairing beautifully with yellow, white, or rose gold settings. For those seeking an investment-worthy gemstone with both individuality and dramatic visual impact, this concave-cut ametrine delivers a balance of rarity, craftsmanship, and unmistakable 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.