Neptunite - image 1
Neptunite - image 2

Neptunite

Tama Higuchi
Tama Higuchi
Dallas, TX
0 for sale·Member since 2025

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

Species
Neptunite, NatroliteAbout Neptunite →
SizeMiniature
Dimensions2.8 cm
Added on02/19/2026
Locality
USA, California, California State Gem MineRegional guide →

Known provenance

DateCollectorAcquisition price
02/2024Tama HiguchiNot disclosed
Mineral Classics, Brian Kosnar

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
from the California State Gem Mine is one of the great black-crystal classics of American mineral collecting: sharp, monoclinic prisms with a lacquered, almost metallic-looking luster, rising from white natrolite and, on the most coveted pieces, accompanied by blue benitoite and tiny honey- to orange-brown joaquinite-(Ce). Thick crystals read as jet-black across the room, but fine edges and broken splinters can flash deep reddish brown to maroon, a color clue that separates neptunite from the tourmaline-like impression it can give at first glance.