Neptunite - image 1
Neptunite - image 2
specimen video

Neptunite

Unknown Owner
A lovely miniature featuring a lustrous DT black neptunite crystal on a natrolite matrix. While the benitoites are the prize from this mine, the neptunites are becoming increasingly more desired and appreciated for what they are.

Product details

Species
NeptuniteAbout Neptunite →
SizeMiniature
Dimensions2.0 x 3.5 x 4.5 cm
Added on04/08/2026
Locality
USA, California, California State Gem MineRegional guide →

Known provenance

DateCollectorAcquisition price
05/2026Unknown Owner$450.00
—Collector’s EdgeNot disclosed

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.