Ulexite

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 2,0 – 2,5
Specific Gravity 1,65 – 1,99
Refractive Index 1,491 – 1,52
Crystal System Monoclinic
Luster Silky
Cleavage Perfect
Fracture Uneven
Color various
Birefringence 0,029
Pleochroism Absent

Mohs Hardness

1 Talc 2 Gypsum 3 Calcite 4 Fluorite 5 Apatite 6 Orthoclase 7 Quartz 8 Topaz 9 Corundum 10 Diamond Ulexite
Mohs hardness of Ulexite shown against the ten reference minerals, from talc (1) to diamond (10).
Mohs Reference mineral Ulexite
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

Crystal System

β a b c Monoclinic a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Ulexite

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About Ulexite

La ulexita es un mineral de borato de sodio y calcio conocido como «piedra TV» o «televisión stone» por su propiedad de transmitir imágenes a través de sus fibras paralelas mediante reflexión interna total, como una fibra óptica natural. En forma satinada es blanca y sedosa; pulida en cabujón sobre texto o imágenes, proyecta la imagen en su superficie. Se extrae en depósitos evaporíticos de desiertos de California, Nevada (EE. UU.) y Chile.

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Frequently Asked Questions

What is Ulexite?
La ulexita es un mineral de borato de sodio y calcio conocido como «piedra TV» o «televisión stone» por su propiedad de transmitir imágenes a través de sus fibras paralelas mediante reflexión interna total, como una fibra óptica natural. En forma satinada es blanca y sedosa; pulida en cabujón sobre
What is the hardness of Ulexite?
Ulexite has a Mohs hardness of 2.0 to 2.5, making it relatively soft for use in jewelry.
What color is Ulexite?
Ulexite is primarily Various.
How much does Ulexite cost?
Ulexite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Ulexite?
Ulexite belongs to the Monoclinic crystal system.