Natural Untreated Ametrine Loose Gemstone – 12.26ct Cushion Cut Bi-Color Quartz, 14mm Earth Mined Collector Gem
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Natural ametrine is one of the rare gemstones that feels almost magical — a single crystal displaying both rich golden citrine and regal purple amethyst in perfect harmony. This exceptional 12.26ct cushion cut ametrine showcases dramatic color zoning with beautiful clarity and brilliance, creating a gemstone that shifts in personality with every angle and every change of light. Untreated and earth-mined, this gem celebrates nature’s artistry exactly as it formed within the earth.
At an impressive 14mm size, this loose ametrine is ideal for a truly one-of-a-kind statement ring or pendant. The soft cushion cut enhances both the vibrancy and depth of the colors while offering a timeless, elegant silhouette. Whether collected as an investment-grade gemstone or transformed into a custom heirloom piece, this ametrine offers rarity, individuality, and unmistakable presence that mass-produced gems simply cannot replicate.
We have both single gemstones and matched pairs of ametrine available. If you would like a pair, please select a quantity of 2 when placing your order, and we will make sure to send you a well-matched set.
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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.