Natural Black 12 Ray Star Sapphire 1.88ct Unheated Oval Cabochon

A rare natural black star sapphire displaying the exceptional 12-ray asterism that occurs when two intersecting sets of rutile silk needle inclusions are present within the crystal, doubling the usual six rays into a dense, mesmerizing star. The stone presents a deep brownish-black body with warm golden-bronze undertones that emerge under incandescent light, the rays stretching across the entire domed surface in an unmistakable pattern.

Sourced from Thailand, a major producer of black star sapphires, and left completely untreated to preserve its natural optical phenomenon. Star sapphires displaying 12 rays are significantly rarer than the standard 6-ray variety, making this an unusual collector's piece as well as a striking centerpiece for bold jewelry designs.

• Stone type: Natural black star sapphire
• Phenomenon: Asterism (12-ray star)
• Treatment: Untreated
• Cut: Oval cabochon
• Size: 8.8x6.6mm
• Weight: 1.88ct
• Clarity: Opaque
• Origin: Thailand

Natural black star sapphire, September birthstone - sold loose, single stone.