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

Amazon Wide selection

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About Ulexite

ウレクサイトは含水ナトリウム‐カルシウムホウ酸塩鉱物で、繊細な絹状白色の繊維状または粒状の集合体を形成し、「テレビ石」とも呼ばれます。平行に配列した繊維が天然の光ファイバーのような働きをして、接面に置いた文字や画像をそのまま反対面に投影する性質が特筆されます。カリフォルニア州・ネバダ州の乾燥した蒸発岩盆地とチリのアタカマ砂漠に産出します。

On this page

Jewelry Use

Durability 1/10

Science FYI Family

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Frequently Asked Questions

What is Ulexite?
ウレクサイトは含水ナトリウム‐カルシウムホウ酸塩鉱物で、繊細な絹状白色の繊維状または粒状の集合体を形成し、「テレビ石」とも呼ばれます。平行に配列した繊維が天然の光ファイバーのような働きをして、接面に置いた文字や画像をそのまま反対面に投影する性質が特筆されます。カリフォルニア州・ネバダ州の乾燥した蒸発岩盆地とチリのアタカマ砂漠に産出します。
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.