Neptunite from California State Gem Mine, California, USA - image 1
Neptunite from California State Gem Mine, California, USA - image 2

Neptunite from California State Gem Mine, California, USA

Tama Higuchi collection #269

Nice fat, terminated neptunite crystal. This one is unusual in that the natrolite is in its intact, natural form, without any etching usually done to reveal the neptunite/benitoite xls from their matrix.

Product details

SpeciesNeptuniteNatrolite
SizeMiniature
Dimensions2.8 cm
Added on02/19/2026
LocalityUSA, California, California State Gem Mine
Current owner
Tama Higuchi
Tama Higuchi
Dallas, TX
Acquired
Feb 2024

Owner’s note

Mineral Classics, Brian Kosnar

2 for sale·Member since 2025

Learn more

Neptunite
Mineral guide
Learn about Neptunite
jet-black, high-luster prisms with natrolite and benitoite; California State Gem Mine specimens exemplify striking contrast, rarity, and display.
Neptunite
Regional guide
Neptunite from California State Gem Mine, USA
California State Gem Mine, San Benito County - famed for black neptunite with blue benitoite in natrolite, offering dramatic contrast and collector appeal.
Locality guide
California State Gem Mine
California State Gem Mine, USA — type locality for benitoite; gem-quality blue benitoite with natrolite and neptunite, highly prized by collectors.