Ulexite crystals TV stone RARE 3 piece lot (three) crystals California

$17.99 Buy It Now or Best Offer
free,30-Day Returns

Seller Store gemrockstoneco
(11279) 99.5%,

Location: San Diego, California
Ships to: US,
Item: 323975901535

Restocking Fee:No
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money back or replacement (buyer’s choice)
Return policy details:

Rare crystal ulexite,from California, commonly known as TV stone due to the crystals ability to transmit images,like the printing in the picture here ,from the backside to the front side hence appearing like a TV screen,,much like fiber optic technology..Each buyer will receive 3 stones scooped from stones as pictured,,the picture shows several crystals so you can see various shapes and the optical properties,, with the stone size running approximately 1 1/4 to 2 inch wide and long by 1/2 inch deep.Ulexite (NaCaB5O6(OH)6•5(H2O)) (hydrated sodium calcium borate hydroxide), sometimes known as TV stone,occurs in silky white rounded crystalline masses or in parallel fibers. The natural fibers of ulexite conduct light along their long axes, by internal reflection.Ulexite is a structurally complex mineral, with a basic structure containing chains of sodium, water and hydroxide octahedra. The chains are linked together by calcium, water, hydroxide and oxygen polyhedra and massive boron units.Ulexite is also known as TV rock due to its unusual optical characteristics. The fibers of ulexite act as optical fibers, transmitting light along their lengths by internal reflection. When a piece of ulexite is cut with flat polished faces perpendicular to the orientation of the fibers, a good-quality specimen will display an image of whatever surface is adjacent to its other side.The fiber-optic effect is the result of the polarization of light into slow and fast rays within each fiber, the internal reflection of the slow ray and the refraction of the fast ray into the slow ray of an adjacent fiber.An interesting consequence is the generation of three cones, two of which are polarized, when a laser beam obliquely illuminates the fibers.These cones can be seen when viewing a light source through the mineral. This crystal brings focus and clarity to tasks as well as understanding and vision to interpersonal relationships.

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