0.40 Ct. Madeira (Reddish Orange) Citrine from Brazil

This listing describes a single, transparent 0.40 carat round shape madeira citrine, presented by The Natural Gemstone Company, with dimensions of 5.08 by 5.08 by 2.86 mm. The gem exhibits a vivid reddish orange hue that typifies the madeira designation, and it has been cut in a mixed brilliant style to balance maximum light return with faceted symmetry. Clarity has been graded as very very slightly included, evaluated at eye level, which indicates the presence of only minor internal features that do not detract from overall transparency or visual appeal. The cut quality and excellent polish combine to deliver crisp facet junctions, a well defined table plane, and consistent crown and pavilion geometry, all of which contribute to the stone producing consistent scintillation when subjected to direct and diffused lighting. Enhancement is limited to controlled heat treatment, a stable and widely accepted practice to refine and stabilize color in quartz family gemstones. Origin is Brazil, a provenance known for producing citrine with rich, warm tones and reliable crystalline structure.

The stone’s color and character are best understood when placed in the context of deep geologic time and the processes that formed it millions of years ago. Citrine is a variety of quartz, a mineral form of silica, and the vivid madeira tone of this gem traces back to silica rich fluids that circulated through fissures and cavities within host rock during periods of regional metamorphism and hydrothermal activity. Over extended intervals, these fluids deposited layers of crystalline quartz, with trace amounts of iron incorporated into the growing lattice. Subsequent tectonic events and local thermal anomalies induced natural heating and chemical adjustments within the crystal, promoting charge transfer and oxidation states that produce the warm yellow to reddish orange palette associated with madeira citrine. In the Brazilian deposits where this gem originated, repeated cycles of fluid influx, slow cooling, and localized reheating created conditions favorable for the growth of clear, well formed crystals. The result is a stone that records, in its color and internal structure, a sequence of geological environments and thermal episodes spanning millions of years, offering both aesthetic appeal and a tangible connection to the earth processes that created it.

From a gemological and practical perspective, this 0.40 carat round madeira citrine is well suited to a variety of fine jewelry applications, where its compact dimensions and strong color saturation can provide a focal point without overwhelming companion metals or stones. The mixed brilliant cut is intended to combine the fire and dispersion associated with brilliant faceting on the crown, with controlled pavilion angles that preserve depth and color saturation, resulting in a balanced presentation under both natural and artificial lighting. The very very slightly included clarity grade indicates that inclusions are minimal and pose no concern for durability, while the excellent polish ensures smooth facet surfaces that resist abrasion and preserve luster over time when worn with normal care. Heat treatment has been applied to achieve the optimized madeira hue, a stable enhancement that is industry standard for citrine, and one that does not compromise the structural integrity of the quartz. Given its Brazilian origin, consistent cutting standards, and conservative enhancement, the piece is appropriate for secure settings and routine wearing, provided standard precautions are followed to avoid prolonged exposure to extreme heat or harsh chemicals. The Natural Gemstone Company provides this description to document the gemological attributes and provenance of the stone for informed selection and design, and to support responsible placement within bespoke and ready to wear jewelry designs.