9.13 Ct. Bi Color Ametrine from Brazil

There are gemstones that carry the weight of centuries in their color, and there are gemstones that feel like a living bridge between eras, as timeless as the craft that shapes them. This 9.13 carat cushion shape bi color ametrine is such a stone, a gem that speaks of ancient traditions and enduring elegance. Ametrine has long been admired for its natural marriage of purple and golden hues, a convergence that was once the realm of kings and mystics, and which now graces jewelry that will be cherished across generations. When you hold this piece, you are touching a story that reaches back to the earliest gem traders, and forward into the future as a modern classic, a jewel designed to become an heirloom.

What gives this ametrine a sparkle that is unmatched by others is not a single feature, it is the harmonious interplay between its crystalline structure and the artistry of its cutting. Ametrine is quartz, a silica framework that forms in a trigonal crystal system, and within that ordered lattice the iron that suffuses the crystal can be in differing oxidation states. Those subtle chemical differences crystallize as zones of amethyst and citrine, and it is that natural zoning which provides a rare internal contrast. The mixed brilliant cut of this faceted gem amplifies the effect, because the crown and pavilion facets are aligned to both capture and reflect light across those color zones. Light enters through the broad cushion table, refracts within the clear, nearly eye clean crystal, and then scatters across the edges of the purple and golden planes, producing scintillation and flashes of color that appear to move as the gem is viewed. The refractive character of quartz gives a delicate, luminous fire, and in this particular ametrine the intense color intensity combines with an excellent polish to deliver a brilliance that feels both lively and refined.

Every physical detail of this stone has been considered to maintain its classical beauty, while maximizing optical performance. At 13.93 by 13.71 by 8.00 mm the cushion shape offers a generous surface area, allowing the dual tones to present themselves with clarity and drama, and the 9.13 carat weight ensures presence on the hand or pendant. The mixed brilliant faceting pattern produces a balance of sparkle and color saturation, allowing bright scintillation from the pavilion facets, and broad color flashes from the crown. Clarity is graded very slightly included evaluated at eye level, which means the gem reads as essentially eye clean, while still being a natural stone with character that confirms its authenticity. The excellent polish means every facet edge is finished to mirror quality, increasing light return and creating crisp, lively reflections. The stone has been heat treated, an enhancement that is commonly used to stabilize and intensify color in quartz, and the result is an intense color intensity that holds true under varied lighting. This ametrine comes from Brazil, a source known for producing gems with strong, vibrant color, and we at The Natural Gemstone Company are proud to present it with full respect for its geological and aesthetic lineage.

As a piece to be set into jewelry, this ametrine is ideal for classic designs that honor heritage, yet it also adapts beautifully to contemporary compositions. In a traditional three stone ring, the cushion bi color face will serve as a noble center flanked by diamonds, evoking the royal associations of purple and the warm glow of citrine. In a solitaire pendant, the generous table will catch light against the collarbone, displaying the two colors in movement. For those who seek a ring that will be worn daily, the robust nature of quartz and the stone size offer resilience and versatility. Presented by The Natural Gemstone Company, this gem carries our commitment to quality, provenance, and the kind of craftsmanship that allows a gemstone to become a treasured possession. If you value stones that tell a story, that connect eras and embody both history and modernity, this bi color cushion ametrine is a rare offering, a living relic ready to be set into a design that will be admired for decades.