0.53 Ct. Semi-Black Opal from Australia

One translucent marquise shape opal is presented, weight 0.53 carat, dimensions 10.17 x 5.17 x 1.80 mm, tablet cut, Semi Black Opal type, origin Australia, no enhancement. Clarity is graded eye clean, evaluated at eye level, color intensity is intense, and the polish is excellent. The tablet cut produces a shallow domed profile that preserves a broad expanse of play of color across the surface, while the marquise outline provides an elongated silhouette that remains practical for a variety of settings. The Natural Gemstone Company is listing this single specimen with full details to support accurate evaluation and setting decisions.

Visually the stone exhibits a multi color play, with dominant warm red and green flashes, and secondary blue to violet tones that emerge when the stone is viewed from different angles and under varied lighting. The translucent body allows light to penetrate and interact with the internal structure, producing a layered effect that complements the tablet cut. Because the color patches are well distributed across the surface, the marquise shape presents a balanced appearance when set, with color movement along the long axis. The tablet cut and excellent polish enhance the stone surface, delivering clean reflections and a smooth transition between color zones. These characteristics make the opal suitable for use in rings, pendants, and earrings, and particularly attractive when set in a bezel or low profile mount that protects the thin edges while allowing the face to receive light.

Practical considerations for this specimen are straightforward, given the eye clean clarity and the absence of enhancements, but attention to mounting and care will preserve its appearance. The shallow thickness at 1.80 mm recommends protective setting choices that reduce the risk of edge nicking, and the tablet profile benefits from a secure bezel, partial bezel, or custom cup setting that supports the perimeter. Opal is sensitive to sudden temperature changes and harsh chemicals, and mechanical shocks should be avoided, so ultrasonic cleaning and steam cleaning are not recommended, and gentle cleaning with mild soap and water is preferred. Provenance from Australia and the no enhancement condition support stability expectations, while the Semi Black classification indicates a darker body tone relative to light opals, contributing to stronger color contrast and an especially vivid play of color. For additional technical information, high resolution images, or facet and setting diagrams, please contact The Natural Gemstone Company.