7.20 Ct. Bi Color Ametrine from Brazil

This specimen is a transparent, bi color ametrine weighing 7.20 carats, presented in a classic cushion shape that measures 13.12 x 12.22 x 7.64 mm, cut in a mixed brilliant style, with a clarity grade of eye clean at eye level, intense color intensity, and an excellent polish. The material originates from Brazil, and the stone has been heat treated as a standard stability enhancement to optimize color saturation. The mixed brilliant cut balances a brilliant crown with a modified step pavilion to combine scintillation and broad color flash, and the precision of the pavilion and crown facet junctions was executed to maximize both light return and controlled color zoning. At The Natural Gemstone Company we prioritize accurate cutting protocols that preserve weight while improving optical performance, and this ametrine embodies that philosophy in both proportion and finish.

From a faceting perspective the mixed brilliant design is purposeful, the brilliant crown facets produce complex, multi directional light return that animates the violet and citrus color components, while the modified step pavilion preserves color separation and gives the gem a stable window through which the bi color character can be read under varied lighting. The cushion outline enhances the visual spread of the stone, permitting larger facet planes across the crown that act as stage surfaces for color interaction, while the rounded corners of the cushion reduce edge light leakage and contribute to an overall feeling of depth. The cutter maintained consistent facet alignment and symmetry, the excellent polish enhances contrast between bright and dark facet areas, and the result is robust scintillation combined with even, saturated color fields that read as intense even at arm length.

Optically this ametrine displays a striking bi color contrast that is immediately noticeable in a jewelry setting, the purple amethyst component reads as a deep, cool violet with strong saturation, while the citrine component rests as a warm, carroty gold that provides complementary contrast, the juxtaposition of cool and warm tones increases visual impact and helps the stone stand out in both white metal and warm metal mountings. Because the clarity is eye clean, the color fields remain uninterrupted by visible inclusions, allowing uninterrupted light transmission and crisp facet reflections. Pleochroic behavior in ametrine allows the dominant hue to shift subtly with viewing angle and with the orientation of the stone in a setting, and the mixed brilliant faceting was oriented by the cutter to present a balanced, aesthetic split between the two colors when viewed table up, which is advantageous for common ring and pendant applications.

For practical use and design integration the dimensions and the 7.20 carat weight deliver a commanding presence on a finger, the cushion silhouette and mixed brilliant faceting make this gem well suited to a solitaire prong setting where light can enter freely from the pavilion, and it also reads beautifully set as a center stone in a halo where surrounding accent stones increase perceived size and emphasize the bi color contrast. Given that ametrine is a variety of quartz with a Mohs hardness of seven, standard protective considerations apply, avoid hard knocks and abrasive cleaners, routine cleaning with warm soapy water and a soft brush preserves polish, and the stabilization from heat treatment is permanent under normal wearing conditions. Available from The Natural Gemstone Company this cushion bi color ametrine combines thoughtful cutting technique, vivid, intense color, and a clean material foundation, and it will command attention in any jewelry setting where clear, saturated bi color expression is required.