• Chemistry: Ca6Si6O17(OH)2, Calcium Silicate Hydroxide.
  • Class: Silicates
  • Subclass: Inosilicates
  • Uses: Only as a mineral specimen.
  • Specimens

Xonotlite is named for its type locality, Tetela de Xonotla, Puebla, Mexico. It has also been called Eakleite.

It frequently forms tuffs of fine white acicular crystals in veins in serpentine formations and along contact zones.


  • Color is Colorless, Gray, Lemon white, Light gray, or Pink.
  • Transparency: Specimens are transparent.
  • Luster: Vitreous to silky.
  • Crystal System is monoclinic.
  • Crystal Habits include tuffs of acicular fibers and massive.
  • Hardness is 6.5.
  • Specific Gravity is approximately 2.7 (average).
  • Streak is white.
  • Notable Occurrences are Tetela de Xonotla, Puebla, Mexico, Arizona, USA, and South Africa.
  • Best Field Indicators are locality, color, crystal habit and hardness.
XONOTLITE specimens:
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XONOTLITE specimen xon-1
$ 54.00
Dims mm=33.5x28.3x22.1
Wt g=17.6
Wessels Mine, South Africa
This specimen has more than two dozen pink balls of xonotlite intergrown on its surface. A few of them have broken open, revealing the radial crystal growth and a white interior - only the outer surface has a pink color. There is also a druze of tiny colorless clear crystals, probably quartz, although the shapes are more like Herkimer diamonds than like common hexagonal quartz crystals.
no photo
xon-1 ($ 54.00)
Wessels Mine, South Africa


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