$1,500Median
22Sold (12 mo)
$1,500Last sale
Neptunite with Natrolite
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A superbly crystallised large cabinet specimen of black Neptunite crystals measuring to 1.5 cm, beautifully contrasting against white Natrolite on a characteristic blue-grey matrix. From the California State Gem mine (Benitoite Gem Mine) in San Benito County, California. The Neptunite occurs as abundant, well-formed lustrous prismatic crystals and is a rare and complex silicate containing potassium, sodium, lithium, iron, manganese and titanium. The Neptunite occurs in Natrolite veins cutting a glaucophane schist inclusion in a serpentinite body. An excellent and showy specimen.
Product details
SizeCabinet
Dimensions10.0 x 13.0 x 4.4 cm
Added on10/24/2024
LocalityUSA, California, New Idria Mining District
Current owner
Unknown Owner
- Acquired
- Jul 2026
- Price paid
- $4,500.00
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | Crystal Classics | Not disclosed |
Learn more
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.Regional guide
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