Spessartine is garnet at its most electric: a mandarin-orange gem whose color comes from manganese in the crystal itself — no treatment, no enhancement, just chemistry. The finest “Fanta orange” stones, first celebrated from Namibia’s Kunene deposits and now sourced chiefly from Nigeria and Tanzania, are among the most vivid gems in existence.Like all garnets, spessartine is singly refractive and typically eye-clean in fine qualities, with a hardness of 7–7.5 that suits every jewelry use. Its high refractive index gives cut stones exceptional brilliance — orange fire that reads across a room.Every spessartine at GEMIC Institute is natural and untreated, examined by our accredited gemologists and certified by our Siem Reap laboratory. The photos and video in each listing show the exact stone for sale; each one is unique and permanently retired at purchase. Orders ship worldwide with tracking, protected by our 30-day inspection period. For calibrated sizes or matched spessartine pairs, our gem hunting service can source them.