Dark Light
-5%
, ,

NEPTUNITE

Availability:

In stock


A rare mineral specimen of Neptunite is for sale. A stunning piece with a cluster of Black Neptunite in the center of White Natralite. This specimen is from old stock.

KNa2Li(Fe, Mn)2Ti2Si8O24
Potasium Sodium Lithium Iron Manganese Titanium Silicate.

Location:
New Idria Mine, San Benito, Calafornia, USA.

Dimensions:
9.5cm x 6.4cm x 5.5cm, 187g.

Neptunite was discovered during this century and is rare. Its most famous specimens come from the wonderful deposits at San Benito County in California. This site contains natrolite veins in a serpentinite rock.

$271 $285

In stock

Compare

NEPTUNITE

A rare mineral specimen of Neptunite is for sale. A stunning piece with a cluster of Black Neptunite in the center of White Natralite. This specimen is from old stock.

KNa2Li(Fe, Mn)2Ti2Si8O24
Potasium Sodium Lithium Iron Manganese Titanium Silicate.

 

Location:
New Idria Mine, San Benito, Calafornia, USA.

Dimensions:
9.5cm x 6.4cm x 5.5cm, 187g.

Neptunite was discovered during this century and is rare. Its most famous specimens come from the wonderful deposits at San Benito County in California. This site contains natrolite veins in a serpentinite rock. Embedded in the pure white natrolite are the sapphire blue benitoite and the black prismatic crystals of Neptunite. The assemblage is a classic among collectors and specimens with all three minerals are much sought after. Neptunite is named after the Roman god of the sea, Neptune because it was found with aegirine, which was named after Aegir.  Crystals are well formed and typically show multiple secondary faces.  The flashes of red that appear to come right from the center of the crystal are a nice added touch.

NEPTUNITE PROPERTIES

Class: Silicates
Subclass: Inosilicates
Uses: mineral specimens.
Specimens

Colour is black to reddish black.
Luster is vitreous.
Transparency crystals are translucent to opaque.
Crystal System is monoclinic; 2/m
Crystal Habits include prismatic, elongated crystals with nearly square cross-sections. The terminations are modified and slanted dome faces. Also found massive and in disseminated grains.
Cleavage is perfect in two direction at 80 and 100 degree angles.
Fracture is splintery.
Hardness is 5.5
Specific Gravity is approximately 3.23 (slightly above average)
Streak is reddish-brown.
Associated Minerals are benitoite, natrolite, serpentine, aegerine and joaquinite.
Other Characteristics:  an internal red reflection can sometimes be seen through the prismatic crystal faces.
Notable Occurrences include the famous San Benito Co., California site as well as Narsarssuk Greenland and the Kola penninsula, Russia.
Best Field Indicators are crystal habit, internal reflection, streak, associations, colour, and cleavage.

Check out more Minerals of the World for sale here.

Weight187 g
Dimensions12 × 10 × 8 cm

NEPTUNITE

A rare mineral specimen of Neptunite is for sale. A stunning piece with a cluster of Black Neptunite in the center of White Natralite. This specimen is from old stock.

KNa2Li(Fe, Mn)2Ti2Si8O24
Potasium Sodium Lithium Iron Manganese Titanium Silicate.

 

Location:
New Idria Mine, San Benito, Calafornia, USA.

Dimensions:
9.5cm x 6.4cm x 5.5cm, 187g.

Neptunite was discovered during this century and is rare. Its most famous specimens come from the wonderful deposits at San Benito County in California. This site contains natrolite veins in a serpentinite rock. Embedded in the pure white natrolite are the sapphire blue benitoite and the black prismatic crystals of Neptunite. The assemblage is a classic among collectors and specimens with all three minerals are much sought after. Neptunite is named after the Roman god of the sea, Neptune because it was found with aegirine, which was named after Aegir.  Crystals are well formed and typically show multiple secondary faces.  The flashes of red that appear to come right from the center of the crystal are a nice added touch.

PROPERTIES

Class: Silicates
Subclass: Inosilicates
Uses: mineral specimens.
Specimens

Colour is black to reddish black.
Luster is vitreous.
Transparency crystals are translucent to opaque.
Crystal System is monoclinic; 2/m
Crystal Habits include prismatic, elongated crystals with nearly square cross-sections. The terminations are modified and slanted dome faces. Also found massive and in disseminated grains.
Cleavage is perfect in two direction at 80 and 100 degree angles.
Fracture is splintery.
Hardness is 5.5
Specific Gravity is approximately 3.23 (slightly above average)
Streak is reddish-brown.
Associated Minerals are benitoite, natrolite, serpentine, aegerine and joaquinite.
Other Characteristics:  an internal red reflection can sometimes be seen through the prismatic crystal faces.
Notable Occurrences include the famous San Benito Co., California site as well as Narsarssuk Greenland and the Kola penninsula, Russia.
Best Field Indicators are crystal habit, internal reflection, streak, associations, colour, and cleavage.

Check out more Minerals of the World for sale here.

You may also like…

Sydney Crystal Show Clicky