Ulexite Crystal USA Natural Borate Mineral Specimen Optical Fibre Stone

Genuine Ulexite Mineral Specimen – Natural Borate Crystal from the USA

This listing is for a genuine Ulexite mineral specimen from the U.S.A., carefully chosen for its distinctive natural form and fascinating mineral character. Often known among collectors as the “optical fibre stone” due to its unique internal structure, ulexite is a highly interesting addition to any mineral collection.

The specimen shown in the photograph is the actual crystal you will receive, ensuring full transparency and confidence when purchasing. Full sizing details can be seen clearly in the photos provided.

Every purchase includes a Certificate of Authenticity lifetime guarantee generic card, confirming that your crystal is a genuine natural mineral specimen.

---

Mineral Identity & Scientific Classification

Ulexite is a naturally occurring borate mineral, composed primarily of sodium, calcium, and boron. It is best known for its fibrous crystal habit, which can create remarkable optical effects.

Key mineral information:

• Mineral Name: Ulexite

• Mineral Group: Borates

• Chemical Formula: NaCaB₅O₆(OH)₆·5H₂O

• Crystal System: Triclinic

• Hardness: 2.5 on the Mohs scale

• Lustre: Silky to vitreous

• Transparency: Translucent to transparent in fibres

• Colour: Typically white, colourless, or pale grey

Its softness and delicate fibrous structure mean it should be handled with care, making it best suited for display and collecting.

---

Unique Optical Properties – “TV Stone” Effect

One of the most famous features of ulexite is its natural fibre-optic phenomenon. When cut and polished, some specimens can transmit light through the fibrous crystals, sometimes creating an effect where patterns beneath the stone appear projected onto its surface.

This optical behaviour is entirely natural and results from:

• Parallel fibrous crystal growth

• Light transmission through internal mineral fibres

• The mineral’s natural translucent structure

Collectors highly value ulexite for this unusual scientific curiosity, making it a standout mineral for educational displays.

---

Geological Formation & USA Locality

Ulexite forms in evaporite environments, developing in arid regions where boron-rich waters evaporate over long periods. It is commonly found in desert lake beds and salt flat deposits.

In the United States, notable ulexite occurrences are associated with:

• Boron-rich evaporite basins

• Desert mineral deposits in the western states

• Sedimentary environments with high evaporation rates

Ulexite is often found alongside other evaporite minerals such as:

• Gypsum

• Halite

• Colemanite

• Borax

These geological settings make ulexite an excellent example of mineral formation through natural chemical precipitation.

---

Specimen Characteristics & Display Appeal

This ulexite specimen features the classic fibrous structure that gives the mineral its silky appearance. Natural pieces may show:

• Soft white fibrous growth

• Satin-like sheen

• Compact nodules or irregular crystal masses

• Subtle translucency along fibres

Because ulexite is delicate, it is best displayed in a cabinet or protective case to preserve its natural condition.

---

Collecting, Gifting & Educational Use

Ulexite is an outstanding choice for:

• Mineral and crystal collectors

• Geology students and educational collections

• Unique display specimens for curiosity cabinets

• Gifts for those interested in rare natural minerals

Its combination of unusual chemistry, evaporite origin, and optical properties makes it a memorable and conversation-worthy specimen.

In spiritual traditions, ulexite is sometimes traditionally associated with clarity symbolism, but this listing is offered strictly as a natural mineral collectible with no medical or outcome-based claims.

---

Authenticity & Purchase Information

• Genuine Ulexite mineral specimen

• Origin: United States of America

• Natural borate crystal with fibrous structure

• Photo shows the actual specimen you will receive

• Includes Certificate of Authenticity lifetime guarantee generic card

• Carefully selected collectible mineral piece

• Full sizing available in listing photographs

A remarkable ulexite specimen from the USA, prized for its fibrous crystal habit and fascinating optical character, perfect for collectors, displays, and geology enthusiasts.