- Neptunite, Natrolite
- Small Cabinet, 6.3 x 5.7 x 2.4 cm
- Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California
Lustrous, jet-black neptunite crystals are richly and aesthetically strewn on contrasting snow-white natrolite and matrix on this fine specimen from the Dallas Gem Mine. The neptunites reach 1.6 cm.