- Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil
- Small Cabinet, 6.5 x 5.3 x 4.1 cm
Highly lustrous, black manganotantalite crystals cover this showy specimen of essentially solid manganotantalite from Equador, Brazil. Manganotantalite is an uncommon tantalum species and this is highly representative for this locality. HEAVY at 448 grams or nearly a pound!