2.04 Carat Natural Cobalt Blue Spinel – Tanzania

A striking 2.04 carat natural cobalt spinel from Tanzania, displaying a deep blue body color with vivid flashes of brighter cobalt and electric blue as the gemstone moves through different angles of light.

The stone is fashioned in a classic oval faceted cut, measuring 8.22 × 6.32 × 5.1 mm. At just over the important 2-carat mark, it offers substantial presence for a collector or as the centerpiece of a custom fine-jewelry design.

The accompanying AIG gemological report identifies the gemstone specifically as NATURAL COBALT SPINEL, documents its Tanzanian origin, and states “No Indication Of Heat.”

Gemstone Details

• Gemstone: Natural Cobalt Spinel
• Weight: 2.04 carats
• Color: Blue
• Origin: Tanzania
• Shape/Cut: Oval Faceted Cut
• Measurements: 8.22 × 6.32 × 5.1 mm
• Treatment: No indication of heat
• Hardness: 8.0 Mohs
• Condition: Loose gemstone
• Gemological Report: AIG – American International GemLab
• Report No.: GEM20260904179280

A Distinctive Collector Gemstone

Natural blue spinel occupies an unusual place within the spinel family, and cobalt-associated blue material is particularly sought after by collectors. This specimen combines documented cobalt spinel identification, Tanzanian origin, a weight exceeding 2 carats, and a report stating no indication of heat.

Its oval faceting produces contrasting areas of deep navy blue and brighter electric-blue flashes, creating a dramatically different appearance as the stone is rotated through the light.

Natural Character

This is a naturally included gemstone. Internal characteristics may become considerably more apparent under high-magnification macro photography than during ordinary viewing. Listing photographs are intended to provide a detailed representation of the stone’s natural character.

Color, brightness and reflections can vary depending on lighting conditions, camera settings and viewing angle.

Offered at $4,000

An impressive 2.04 ct natural Tanzanian cobalt spinel for the collector seeking an unusual blue gemstone with documented identification and origin.

The exact gemstone pictured is the gemstone you will receive.