Dimensions: 8.01 × 9.03 × 5.64 mm Weight: 3.01 carats ⸻ Colour Exceptional vivid cobalt-blue with strong saturation and medium to medium-deep tone. This stone displays the highly desirable electric cobalt character — a vibrant, intense blue rarely seen in spinel. Under neutral daylight, it shows a rich royal-to-electric blue, while under cooler lighting it exhibits remarkable brilliance and lively internal reflections. Unlike ordinary blue spinel, this gem owes its colour to cobalt — significantly rarer and more sought after by collectors. ⸻ Clarity Transparent. Eye-clean at normal viewing distance. Under 10× magnification, minor natural inclusions typical of natural cobalt spinel are present. These inclusions confirm natural origin and do not affect overall brilliance or durability. ⸻ Cut & Presence Heart cut — a rare and challenging shape to execute properly. The stone presents an attractive, symmetrical outline with excellent face-up presence. At over 3 carats, this is a substantial size for cobalt spinel, especially in a heart shape — a combination rarely encountered on the market. ⸻ Lustre Strong vitreous lustre with lively brilliance and good light return. ⸻ Condition Excellent overall condition. No visible chips, scratches, or abrasions. No durability concerns. ⸻ Treatments No indication of thermal treatment (PL tested), as stated in the GRS report. No evidence of any other treatment. ⸻ Certification GRS GemResearch Swisslab Report No. GRS2025-051462 Origin: Tanzania Identification: Natural Cobalt Spinel