Xonotlite
Xonotlite is a rare calcium silicate mineral typically found in white, fibrous or prismatic crystal forms.

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Xonotlite

Xonotlite is a hydrous calcium silicate mineral that forms in metamorphosed limestone or contact metamorphic environments. It commonly appears as white, colorless, or pale gray fibrous crystals. It has a silky to vitreous luster and is often associated with other calcium-rich minerals. Due to its softness and fibrous structure, it is mainly used for industrial purposes and collected as a mineral specimen rather than for jewelry.

Physical & Chemical Properties

NameXonotlite
Scientific NameXonotlite
Mineral GroupSilicate Mineral
Hardness (Mohs)6 – 6.5
ColorWhite, colorless, pale gray
OriginUSA, Italy, Japan, Russia, Norway
Chemical FormulaCa₆Si₆O₁₇(OH)₂

Quick Facts

Crystal SystemMonoclinic
Specific Gravity2.7 – 2.8
BirthstoneNot a traditional
Refractive Index1.58 – 1.60
Optical CharacterBiaxial (+)
DispersionLow
Major SourcesUSA, Italy, Japan, Russia, Norway
Treatmentsuntreated
Price Range$20 – $100
Care InstructionsHandle carefully. Avoid pressure, scratches, and harsh chemicals. Clean gently with soft cloth and water only.
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