NATURAL BLACK STAR SAPPHIRE CABOCHON - PREMIUM QUALITY SPECIMEN

AN EXCEPTIONAL NATURAL BLACK STAR SAPPHIRE CABOCHON DISPLAYING A WELL-DEFINED SIX-RAYED ASTERISM. THIS POLISHED GEMSTONE SPECIMEN EXHIBITS THE CHARACTERISTIC OPTICAL PHENOMENON CREATED BY ALIGNED RUTILE NEEDLE INCLUSIONS WITHIN THE CORUNDUM CRYSTAL STRUCTURE, PRODUCING A STRIKING SILVERY STAR EFFECT ACROSS THE DARK SURFACE WHEN ILLUMINATED.

GEMOLOGICAL SPECIFICATIONS:
- MATERIAL: NATURAL CORUNDUM (BLACK STAR SAPPHIRE VARIETY)
- CUT: CABOCHON (DOME-POLISHED)
- ASTERISM: SIX-RAYED STAR, CLEARLY VISIBLE AND WELL-CENTRED
- COLOUR: DEEP BLACK WITH EXCELLENT TRANSPARENCY TO TRANSLUCENCY
- LUSTRE: VITREOUS TO SILKY, ENHANCED BY THE POLISHED SURFACE
- DIMENSIONS: APPROXIMATELY 1.8 CM DIAMETER × 1.2 CM HEIGHT

CONDITION: EXCELLENT. THE CABOCHON DISPLAYS A FLAWLESS POLISHED SURFACE WITH NO CHIPS, CRACKS, OR REPAIRS. THE STAR EFFECT IS SHARP AND WELL-DEFINED, INDICATING PROPER ORIENTATION AND CUTTING. NATURAL INCLUSIONS ARE MINIMAL AND CONSISTENT WITH GENUINE, UNHEATED NATURAL CORUNDUM. THE SPECIMEN SHOWS NO EVIDENCE OF TREATMENT OR ENHANCEMENT BEYOND THE STANDARD CABOCHON POLISHING.

PRESENTATION: HOUSED IN A PROFESSIONAL GEMOLOGICAL PRESENTATION CASE WITH ACCOMPANYING IDENTIFICATION DOCUMENTATION. THE SPECIMEN IS SUITABLE FOR THE SERIOUS COLLECTOR, JEWELLERY DESIGNER, OR GEMOLOGICAL STUDY.

293503+12

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