4.17 Ct. Semi-Black Opal from Australia

This listing from The Natural Gemstone Company describes a finely presented Semi Black Opal, translucent in body tone, weighing 4.17 carats, with an oval outline and precise dimensions of 12.99 by 11.62 by 4.23 millimeters. The gem is fashioned in a tablet cut, chosen to emphasize surface play of color while maintaining a comfortable profile for most jewelry settings. Clarity is graded very slightly included, evaluated at eye level, indicating minor internal features that do not detract from overall appeal, and the piece displays intense color intensity across its face. The polish is excellent, providing a smooth, reflective surface that supports strong light interaction and enhances the opal’s visible color dynamics. There has been no enhancement applied to this stone, and its recorded origin is Australia, a source well known for opal material with stable and attractive play of color.

Visually the stone exhibits a multi color palette, with green and blue flashes as primary impressions in typical lighting, supported by secondary notes of purple and subtle warmer tones that become more apparent under different angles of view. The translucent body allows light to penetrate and reflect from inner structures, producing a deep, lively effect that is characteristic of higher quality Semi Black Opal material. The tablet cut produces a gentle, domed surface with a relatively flat lower portion, which helps to concentrate the color patches toward the surface and keeps the visual field broad and accessible. Color patches are well distributed without large voids of plain body tone, and the overall patterning reads as balanced, providing strong color impact from multiple viewing directions rather than relying on a single sweet spot.

From a gemological and practical perspective the proportions and weight of this example make it suitable for a variety of bespoke settings, including single stone rings, pendants, or bespoke cufflinks where the tablet profile can sit comfortably without excessive elevation. The dimensions and oval outline are compatible with standard mounting sizes, and because the cut is tablet, attention to bezel or low profile prong settings is recommended to protect the stone while allowing unobstructed view of the play of color. The very slightly included clarity grading suggests that standard jewelry care procedures will be sufficient to preserve structural integrity, however gentle handling and avoidance of high impact are advised as with all hydrated silica based gems. The 4.17 carat weight is substantial for Semi Black Opal material, offering visual presence in wearable pieces while remaining manageable for daily or occasional wear depending on chosen setting design.

Documentation and handling information provided with this opal reflects its natural origin and treatment history, specifically noting that no enhancement has been performed, which is important for valuation and long term stability. The Australian provenance is recorded, aligning with expectations for opals exhibiting intense color play and relatively stable hydration characteristics. For routine care we recommend avoiding prolonged exposure to strong heat and continuous drying conditions, cleansing with a soft cloth and mild soapy water when necessary, and ensuring settings are periodically inspected to maintain secure mounting. The Natural Gemstone Company supplies this description to support informed selection, and the technical details presented here are intended to assist gem cutters, jewelers, and connoisseurs in assessing suitability for intended design and usage.