6.70 Ct. Bi Color Ametrine from Brazil

One beautiful transparent 6.70 carat oval shape bi color ametrine with measurements of 13.02 by 10.86 by 8.39 millimeters, faceted with a mixed brilliant cut, very very slightly included when evaluated at eye level, intense color intensity, and an excellent polish, originates from Brazil and has been heat treated, and this piece from The Natural Gemstone Company represents an exceptional example of what discerning collectors seek in a high-end cabinet. From the moment light enters the pavilion and dances through the faceted crown, the thoughtful mixed brilliant cutting style reveals distinct zones of warm golden citrine tones blending into regal amethyst purple, delivering an eye-catching bi color effect that is simultaneously dramatic and elegant. The oval outline is classic and versatile, lending itself to a variety of custom settings while the substantial 6.70 carat weight provides presence and rarity that smaller commercial ametrines cannot match. The combination of size, intense color zoning, and an excellent polish elevates this gem beyond simple jewelry supply grade stones, making it an ideal centerpiece for collectors who value both aesthetic impact and technical quality.

When compared to the more common single color amethyst or citrine pieces frequently seen on the market, this bi color ametrine stands apart because it offers two distinct color personalities in one natural crystal, creating a built-in contrast that requires careful cutting and a higher grade of rough to achieve. Many mass market ametrines and citrines are either heavily small in size, poorly cut, or display washed out color, and some commercial offerings rely on low grade material or imprecise polishing which reduces brilliance and face up appeal. By contrast, this gem from The Natural Gemstone Company has been expertly cut to maximize both brilliance and the separation of color zones, and the excellent polish adds a mirror like finish that enhances light return and saturation. The clarity being very very slightly included at eye level means the stone is essentially eye-clean to most observers, while still retaining natural character, unlike fully included pieces that appear cloudy or dull. Even compared to synthetic or heavily treated imitations, the authenticity of natural origin coupled with heat treatment used solely to stabilize or enhance color is a transparent and commonly accepted practice in the trade, ensuring a balance of beauty and integrity.

For collectors who consider alternatives such as bi-color tourmaline, alexandrite, or color change garnets, this Brazilian ametrine offers distinct advantages in value and versatility. Alexandrite and high grade color change garnets are rare and command a premium, yet they do not always present the bold two tone juxtaposition that a quality ametrine produces. Bi-color tourmalines can be spectacular, but comparable sizes and clarity will often cost significantly more per carat, and many lack the crisp, saturated contrast seen in this specimen. In terms of toughness and everyday wearability, ametrine is a member of the quartz family with a Mohs hardness of approximately seven, which gives it greater resistance to scratching than softer collector gems such as opal or some varieties of garnet, and it is easier to set securely without extensive protective measures. The oval mixed brilliant cut also optimizes light performance and minimizes the visibility of the very very slight inclusions, making this a practical choice for a high end ring or a striking pendant where the play of color can be appreciated from multiple angles.

Choosing this ametrine from The Natural Gemstone Company means selecting a gemstone that has been sourced with provenance, evaluated carefully for cut, clarity, and color, and presented honestly with its enhancement clearly stated as heat treated and its origin recorded as Brazil. For the collector who prioritizes a balance of aesthetic uniqueness, technical excellence, and sensible value, this 6.70 carat bi color ametrine excels where many alternatives fall short, offering a rare combination of intense dual color, substantial size, excellent polish, and eye level clarity. It is an ideal focal point for a custom heirloom piece, a standout addition to a thematic collection of color contrast gems, or an investment grade specimen for the gem connoisseur who appreciates both natural beauty and meticulous craftsmanship. If you are considering a high end addition that will consistently draw attention and hold its appeal, this ametrine is a choice that harmonizes rarity and wearability, and our team at The Natural Gemstone Company is ready to provide further details, professional imagery, and guidance on setting options to help you realize its full potential.