$50Median
1Sold (12 mo)
$50Last sale
Ulexite specimens for sale
1 for sale · $160 USD
18 in the gallery
Ulexite is a borate mineral that forms as transparent to opaque white to colorless nodules and fibrous aggregates. It has a pearly to vitreous luster and often displays a silky or silky-melted appearance, characteristic of its fuzzy, fibrous habit. The mineral is renowned for its unique internal transparency, which allows light to pass through layers and produce a natural image on the opposite surface, a phenomenon known as satiny bituminite in some descriptions.
- Formula
- NaCa[B5O6(OH)6] · 5H2O
- Rarity
- Common
- Stability
- Moderately Stable
- Collector interest
- Very High Interest
- Classification notes
- Borates; hydrated borates (Strunz 6.BA)
Buy Ulexite specimens
View all 1Where Ulexite is found
Top localities
- Boron Open Pit, Boron, Kern County10 specimens
- Boron4 specimens
- West Baker Mine2 specimens
- California1 specimen
- Corkscrew Mine1 specimen
- Baker Mine1 specimen
About Ulexite
Notable localities include several U.S. mines and Peruvian exposures that yield lustrous, well-formed specimens. Collectors prize the soft texture, the striking optical effect, and the way surface polish reveals ghost-like images within the stone. Ulexite tends to form in evaporitic environments and commonly occurs in rolled fibers or blob-like masses that can be cut and prepared for display, highlighting its distinctive interior glow.
